Работает windows search что это такое

The search pane in Windows 11 showing suggested/recent files on the left and Bing search on the right.
Developer(s)	Microsoft
Initial release	January 30, 2007; 16 years ago
Operating system	Microsoft Windows
Predecessor	Indexing Service, Windows Desktop Search
Service name	Windows Search (WSearch)
Type	Desktop search
Website	https://support.microsoft.com/en-us/help/17190/windows-10-search-for-anything

Windows Search (also known as Instant Search) is a content index desktop search platform by Microsoft introduced in Windows Vista as a replacement for both the previous Indexing Service of Windows 2000 and the optional MSN Desktop Search for Windows XP and Windows Server 2003, designed to facilitate local and remote queries for files and non-file items in compatible applications including Windows Explorer. It was developed after the postponement of WinFS and introduced to Windows constituents originally touted as benefits of that platform.

Windows Search creates a locally managed Index of files — documents, emails, folders, programs, photos, tracks, and videos — and file contents, as well as of non-file items including those of Microsoft Outlook for which users can perform incremental searches based on details such as authors, contents, dates, file names, file types, people, and sizes; the Index stores actual prose from inside documents and metadata properties from other content. Control Panel and Settings can also be searched.

Windows Search was introduced in Windows Vista as a replacement for the previous Indexing Service to facilitate data discovery and management, promote greater rapidity of search results, and to unify desktop search platforms across Microsoft Windows; it was also available as an optional download for Windows XP. There have been several updates to its functionality since its introduction, and it is also included in Windows 7, Windows 8, Windows 8.1, Windows 10, and Windows 11.

History[edit]

Windows Search is the successor of the Indexing Service, a remnant of the Object File System feature of the Cairo project which never materialized. Microsoft began development of Windows Search after the postponement of WinFS; it introduces features originally touted as benefits of that platform, such as content indexing, incremental searching, and property stacking.

Overview[edit]

Windows Search creates a locally stored index of files and non-file items stored on a computer.

The time required for the initial creation of this index depends on the amount and type of data to be indexed, and can take up to several hours, but this is a one-time event.^[1] Once a file’s contents have been added to this index, Windows Search is able to use the index to search results more rapidly than it would take to search through all the files on the computer. Searches are performed not only on file names, but also on the contents of the file (provided a proper handler for the file type is installed such as a PDF reader) as well as the keywords, comments and all other forms of metadata that Windows Search recognizes. For instance, searching the computer for «The Beatles» returns a list of music files on the computer which have «The Beatles» in their song titles, artists or album names, as well as any e-mails and documents that include the phrase «The Beatles» in their titles or contents.

Windows Search features incremental search (also known as «search as you type»). It begins searching as soon as characters are entered in the search box, and keeps on refining and filtering the search results as more characters are typed in. This results in finding the required files even before the full search text is entered.

Windows Search supports IFilters, components that enable search programs to scan files for their contents and metadata. Once an appropriate IFilter has been installed for a particular file format, the IFilter is used to extract the text from files which were saved in that format.^[2]

By default, Windows Search includes IFilters for common filetypes, including Word documents, Excel spreadsheets, PowerPoint presentations, HTML files, text files, MP3 and WMA music files, WMV, ASF and AVI video files and JPEG, BMP and PNG images.^[3]

Windows Search uses property handlers to handle metadata from file formats. A property handler needs a property description and a schema for the property for Windows Search to index the metadata.^[4] Protocol handlers are used for indexing specific data stores. For example, files are accessed using File System Protocol Handler, Microsoft Office Outlook data stores using the Outlook Protocol Handler and Internet Explorer cache using the IE History/Cache Protocol Handler.^[5]

Architecture[edit]

Windows Search is implemented as a Windows Service. The search service implements the Windows Search configuration and query APIs and also controls, as well as all indexing and query components. The most important component of Windows Search is the Indexer, which crawls the file system on initial setup, and then listens for file system notifications to pick up changed files in order to create and maintain the index of data. It achieves this using three processes:^[6]

1. SearchIndexer.exe, which hosts the indexes and the list of URIs that require indexing, as well as exposes the external configuration and query APIs that other applications use to leverage the Windows Search features.
2. SearchProtocolHost.exe, which hosts the protocol handlers. It runs with the least permission required for the protocol handler. For example, when accessing filesystem, it runs with the credentials of the system account, but on accessing network shares, it runs with the credentials of the user.
3. SearchFilterHost.exe, which hosts the IFilters and property handlers to extract metadata and textual content. It is a low integrity process, which means that it does not have any permission to change the system settings, so even if it encounters files with malicious content, and by any chance if they manage to take over the process, they will not be able to change any system settings.

The search service consists of several components, including the Gatherer, the Merger,^[7] the Backoff Controller, and the Query Processor, among others. The Gatherer retrieves the list of URIs that need to be crawled and invokes proper protocol handler to access the store that hosts the URI, and then the proper property-handler (to extract metadata) and IFilter to extract the document text. Different indices are created during different runs; it is the job of the Merger to periodically merge the indices.^[7] While indexing, the indices are generally maintained in-memory and then flushed to disk after a merge to reduce disk I/O. The metadata is stored in property store, which is a database maintained by the ESE database engine.^[7] The text is tokenized and the tokens are stored in a custom database built using Inverted Indices.^[7] Apart from the indices and property store, another persistent data structure is maintained: the Gather Queue.^[7] The Gather Queue maintains a prioritized queue of URIs that needs indexing. The Backoff Controller mentioned above monitors the available system resources, and controls the rate at which the indexer runs. It has three states:^[7]

1. Running: In this state, the indexer runs without any restrictions. The indexer runs in this state only when there is no contention for resources.
2. Throttled: In this state, the crawling of URIs and extraction of text and metadata is deliberately throttled, so that the number of operations per minute is kept under tight control. The indexer is in this state when there is contention for resources, for example, when other applications are running. By throttling the operations, it is ensured that the other operations are not starved of resources they might need.
3. Backed off: In this state, no indexing is done. Only the Gather Queues are kept active so that items do not go unindexed. This state is activated on extreme resource shortage (less than 5 MB of RAM or 200 MB of disk space), or if indexing is configured to be disabled when the computer is on battery power, or if the indexer is manually paused by the user.

Advanced Query Syntax[edit]

Windows Search queries are specified in Advanced Query Syntax (AQS) which supports not only simple text searches but provides advanced property-based query operations as well.^[8] AQS defines certain keywords which can be used to refine the search query, such as specifying boolean operations on searched terms (AND, OR, NOT) as well as to specify further filters based on file metadata or file type. It can also be used to limit results from specific information stores like regular files, offline files cache, or email stores. File type specific operators are available as well.^[9] Windows Desktop Search also supports wildcard prefix matching searches.^[10] It also includes several SQL-like operators like GROUP BY. AQS is locale dependent and uses different keywords in international versions of Windows 7.

Programmability[edit]

Users can access the Windows Search index programmatically using managed as well as native code.^[11] Native code connects to the index catalog by using a Data Source Object retrieved from the Indexing Service OLE DB provider. Managed code use the MSIDXS ADO.NET provider. One can query a catalog on a remote machine by specifying a UNC path. Programmers specify the criteria for searches using SQL-like syntax. The SQL query can either be created by hand, or by using an implementation of the ISearchQueryHelper interface. Windows Search provides implementations of the interface to convert an AQS or NQS queries to their SQL counterpart.^[12][13]

The OLE DB/SQL API implements the functionality for searching and querying across the indices and property stores. It uses a variant of SQL in which to represent the query (regular SQL with certain restrictions) and returns results as OLE DB Rowsets.^[7] Whenever a query executes, the parts of the index it used are temporarily cached so that further searches filtering the result set need not access the disk again, in order to improve performance. Windows Search stores its index in an Extensible Storage Engine file named Windows.edb that exists, by default, in the \ProgramData\Microsoft\Search\Data\Applications\Windows\ folder at the root of the system drive in Windows Vista or in later versions of Windows. (The corresponding location in Windows XP is \All Users\Application Data\Microsoft\Search\Data\Applications\Windows\ inside the Documents and Settings folder.)

The index store, called SystemIndex, contains all retrievable Windows IPropertyStore values for indexed items.
Within the SystemIndex folder lurk SystemIndex.*.Crwl and SystemIndex.*.gthr files.^[14]
The names and locations of documents in the system are exposed as a table with the column names System. ItemName and System. ItemURL respectively.^[15] A SQL query can directly reference these tables and index catalogues and use the MSIDXS provider to run queries against them. The search index can also be used via OLE DB, using the CollatorDSO provider.^[16] However, the OLE DB provider is read-only, supporting only SELECT and GROUP ON SQL statements.

Windows Search also registers a search-ms application protocol, which can be used to represent searches as URIs.^[17] The search parameters and filters are encoded in the URI using AQS or its natural language counterpart, NQS. When Explorer invokes the URI, Windows Search (which is the default registered handler for the protocol) launches the Search Explorer with the results of the search. In Windows Vista SP1 or later, third-party handlers can also register themselves as the application protocol handler, so that searches can be performed using any search engine which the user has set as default, and not just Windows Search.

The Windows Search service provides the Notifications API component to allow applications to «push» changed items that need indexing to the Windows Search indexer.^[7] Applications use the component to supply the URIs of the items that need to be indexed, and the URIs are written to the Gather Queue, where they are read off by the indexer. Microsoft Outlook and Microsoft OneNote use this ability to index the items managed by them and use Windows Search queries to provide the in-application searching features. The internal USN Journal Notifier component of Windows Search also uses the Notifications API, monitoring the Change Journal in an NTFS volume to keep track of files that have changed on the volume.^[18] If the file is in a location indexed by Windows Search and does not have the FANCI (File Attribute Not Content Indexed) attribute set,^[7] the Windows Search service is notified of its path via the Notification API.

Windows Search Configuration APIs are used to specify the configuration settings, such as the root of the URIs that needs to be monitored, setting the frequency of crawling or viewing status information like number of items indexed or length of the gather queue or the reason for throttling the indexer.^[7][19]
It^{[clarification needed]} also exposes APIs to register protocol handlers (via the ISearchProtocol() interface, property handlers (via the IPropertyStore() interface) or IFilter implementations (via the IFilter() interface). IFilter implementations allow only read-only extraction of text and properties, whereas IPropertyStore allows writing properties as well.^[7]

Windows Desktop Search[edit]

Windows Desktop Search

Windows Desktop Search running in Windows XP, with preview pane showing thumbnails of search results.
Developer(s)	Microsoft
Stable release	4.0 / June 3, 2008; 15 years ago
Written in	C++[20]
Operating system	Windows 2000 Windows XP Windows Server 2003
Type	Desktop search
License	Freeware
Website	www.microsoft.com/windows/products/winfamily/desktopsearch/default.mspx

Windows Desktop Search, a standalone add-on made available as freeware, is the implementation of Windows Search for Windows 2000, Windows XP and Windows Server 2003.

Windows Desktop Search and Windows Search share a common architecture and indexing technology and use a compatible application programming interface (API).

Searches are specified using the Advanced Query Syntax and are executed while the user types (incremental find). By default, it comes with a number of IFilters for the most common file types—documents, audio, video as well as protocol handlers for Microsoft Outlook e-mails. Other protocol handlers and IFilters can be installed as needed.

Windows Desktop Search allows network shares to be added to the index.^[21][22]

User interface[edit]

The Windows Desktop Search functionality is exposed via a Windows Taskbar mounted deskbar, accessible via a ⊞ Win+⇧ Shift+F keyboard shortcut. It provides a text field to type the query and the results are presented in a flyout pane. It also integrates as a Windows Explorer window. On selecting a file in the Explorer window, a preview of the file is shown in the right hand side of the window, without opening the application which created the file. Web searches can be initiated from both interfaces, but that will open the browser to search the terms using the default search engine.

The deskbar also has the capability to create application aliases, which are short strings which can be set to open different applications. This functionality is accessed by prefixing the ! character to the predefined string. For example, «!calc» opens the Windows Calculator. The help documentation includes syntax for creating application aliases out of any text string, regardless of prefix. This feature can also be used to create shortcut for URLs, which when entered, will open the specified URL in browser. It can also be used to send parametrized information over the URL, which are used to create search aliases. For example, «w text» can be configured to search «text» in Wikipedia.

Releases[edit]

Windows Desktop Search was initially released as MSN Desktop Search, as a part of the MSN Toolbar suite. It was re-introduced as Windows Desktop Search with version 2, while still being distributed with MSN Toolbar Suite.

For Windows 2000, Windows XP and Windows Server 2003, it came in two flavors, one for home users and the other for enterprise use. The only difference between the two was that the latter could be configured via group policy. The home edition was bundled with MSN Toolbar, while the other was available as a standalone application. Later, when MSN Toolbar was discontinued in favor of Windows Live Toolbar, the home edition of Windows Desktop Search was discontinued as well. The last version available for Windows 2000 is Windows Desktop Search 2.66.

For Windows XP and Windows Server 2003, version 3.0 of Windows Desktop Search was provided as a standalone release – separate from Windows Live Toolbar. One of the significant new features is Windows Desktop Search 3.0 also installs the Property System on Windows XP introduced in Windows Vista.^[23] Windows Desktop Search 3.0 is geared for pre-Windows Vista users, hence the indexer was implemented as a Windows Service, rather than as a per-user application, so that the same index as well as a single instance of the service can be shared across all users – thereby improving performance. Windows Desktop Search found itself in the midst of a controversy on October 25, 2007, when Windows Desktop Search 3.01 was automatically pushed out and installed on Windows when updated via Windows Server Update Services (WSUS). Microsoft responded with two posts on the WSUS Product Team Blog.^[24][25]

Windows Vista[edit]

Windows Vista and Windows Server 2008 introduced Instant Search in the Start menu and in Windows Explorer.

It offers a superset of the features provided by Windows Desktop Search (WDS), while being API compatible with it. Unlike WDS, it can seamlessly search indexed as well as non-indexed locations – for indexed locations the index is used and for non-indexed locations, the property handlers and IFilters are invoked on the fly as the search is being performed. This allows for more consistent results, though at the cost of searching speed over non-indexed locations. Windows Search uses Group Policy for centralized management.^[26] Windows Search also supports queries against a remote index.

Windows Search indexes offline caches of network shares, in addition to the local file systems. This means if the file server, on which a network file share is hosted, is running either Windows Vista or a later version of Windows or Windows Search 4.0 on Windows XP, any searches against the share will be queried against the server’s index and present the results to the client system, filtering out the files the user does not have access to. This procedure is transparent to the user.

Microsoft Outlook e-mail stores starting with Outlook 2007, though Outlook 2002 and Outlook 2003 and Microsoft OneNote stores are also indexed if installed alongside Windows Search.^[27]

Unlike Windows Desktop Search on Windows XP, the Windows Search indexer performs the I/O operations with low priority, the process also runs with low CPU priority. As a result, whenever other processes require the I/O bandwidth or processor time, it is able to pre-empt the indexer, thereby significantly reducing the performance hit associated with the indexer running in the background.

Windows Search supports natural language searches; so the user can search for things like «photo taken last week» or «email sent from Dave». However, this is disabled by default.^[28] Natural language search expresses the queries in Natural Query Syntax (NQS), which is the natural language equivalent of AQS.

User interface[edit]

The search functionality is exposed using the search bars in the Start menu and the upper right hand corner of Windows Explorer windows, as well as Open/Save dialog boxes. When searching from the Start menu, the results are shown in the Start menu itself, overlapping the recently used programs. From the Start menu, it is also possible to launch an application by searching for its executable image name or display name. Searching from the search bars in Explorer windows replaces the content of the current folder with the search results. The Explorer windows can also render thumbnails in the search results if a Thumbnail Handler is registered for a particular file type. It can also render enhanced previews of items in a Preview Pane without launching the default application, if the application has registered a Preview Handler. This can provide functionality such as file type-specific navigation (such a browsing a presentation using next/previous controls, or seeking inside a media file).^[29] Preview handlers can also allow certain kind of selections (such as highlighting a text snippet) to be performed from the preview pane itself. In the Control Panel, the search bar in the window can also search for Control Panel options. However, unlike WDS, Windows Search does not support creating aliases.

There is also a Search Explorer, which is an integrated Windows Explorer window that is used for searches. It presents the user interface to specify the search parameters, including locations and file types that should be searched, and certain operators, without crafting the AQS queries by hand. With Windows Vista SP1, third-party applications will be able to override the Search Explorer as the default search interface so that the registered third-party application will be launched, instead of bringing up the Search Explorer, when invoked by any means.^[30]

It is also possible to save a search query as a Virtual Folder, called a Saved Search or Search Folder which, when accessed, runs the search with the saved query and returns the results as a folder listing. Physically, a search folder is just an XML file (with a .search-ms extension) which stores the search query (in either AQS or NQS), including the search operators as well. Windows Vista also supports query composition, where a saved search (called a scope) can be nested within the query string of another search.^[31][32] Search Folders are also distributable via RSS. By default, Windows references the profile of the user who originally created a Search Folder as part of the query’s scope.^[33] This design choice does not prevent saved searches from being shared with other users, but it prevents them from operating on different user profiles. While users can manually modify the contents of a saved search so that the scope references the %USERPROFILE% environment variable, which will enable it to operate on other machines or profiles regardless of the original author, Microsoft has released a SearchMelt Creator utility that automates this process for the user.^[33]

Windows Search 4.0[edit]

Windows Search 4.0 (also previously referred to as Windows Live Search, codenamed Casino or OneView) is the successor to the Windows Search platform for both Windows Desktop Search 3.0 on Windows XP as well as Instant Search on Windows Vista. It is mainly an update to the indexing components, with few changes to the Windows XP user interface and none on Windows Vista. It added remote query support to Windows XP and Windows Server 2003 based systems, which used to be a Vista-only feature. This allows a user with a Vista client (or an XP client with Windows Search 4.0) to search the index of networked machines which are also running a supported operating system.

Windows Search 4.0 was originally proposed by Microsoft’s Windows Live division as an application that would unify local and remote indexed search^[34] in a new interface. Early screenshots of the program featured the new «flair» interface design seen in other Windows Live client applications of the time such as Windows Live Messenger and Windows Live Mail.

Windows Live Search Center could search web services which used the OpenSearch specification to make search results available as web feeds.^[35] It could aggregate searches from various indexes including the Windows Desktop Search index, Windows RSS Platform common feed store, and Microsoft Exchange and Microsoft SharePoint indexes, among others.^[36]

The first beta of Windows Search 4.0 was released on March 27, 2008.^[37] It included numerous performance improvements to the indexer and brought new features, including previously Vista-exclusive ones, to XP, including Group Policy integration, federation of searches to remote indexes, support for EFS-encrypted files and Vista-style preview handlers that allow document-type specific browsing of documents in the preview pane.^[38][39]

Windows Search 4.0 was released on June 3, 2008, and is supported on XP, Windows Server 2003, Vista, Windows Server 2008 and Windows Home Server.^[39][40]

Windows 10[edit]

In Windows 10, Windows Search was added to the taskbar in place of the Start menu in earlier versions of Windows.

A new landing page was added showing users their top apps and recent activities on their computer.^[41][42]

The landing page also provides quick searches provided from Bing for the weather, top news stories, today in history and new movies.

The landing page also serves as a space that Microsoft can advertise in, such as with the new Chromium-based version of Microsoft Edge.

A preview pane from within the Search UI was added that supports apps and documents. When searching for a program, the taskbar jumplists for each program are shown in the preview pane and when searching for documents, file metadata such as file location, date last modified and the document author was also added.

The landing page allows the user to filter searches depending on whether the user looking for documents, pictures or settings.

Spell-correction was also added to Windows Search when searching for Apps & Settings to ensure a wider range of results were shown.

The search box in File Explorer now opens as soon as you click in the box and provides a dropdown of recent searches. Microsoft OneDrive content is also now integrated in addition to the indexed results.^[43] When clicking on the search result, the file will open immediately. Each search result also has a right click menu allowing the user to open the file’s location.

Privacy Concerns[edit]

The Windows Search index is built locally on the PC and no information is sent to Microsoft.^[44]

See also[edit]

• Enterprise search
• List of desktop search engines
• Microsoft Outlook
• Microsoft Search Server

References[edit]

Further reading[edit]

External links[edit]

• iFilter.org

Служба Windows Search отвечает за поиск файлов и папок на устройстве. Она способна искать данные не только по наименованию файлов, но и по содержанию этих файлов (метаданным, свойствам и т.д.). Например, поиск по содержанию файлов по умолчанию активирован для текстовых и офисных документов (txt, doc, docx, xls, xlsx, pdf).

На компьютере может быть очень много файлов и папок. Чтобы поиск по устройству не занимал много времени, служба Windows Search использует индексацию файлов. Процесс индексирования представляет собой чтение диска с данными и запись информации о просканированных файлах в базу данных. Индексирование осуществляется в фоновом режиме. Когда вы сохраните новый документ в индексированном расположении, служба Windows Search проиндексирует его и сохранит собранную информацию о нём в своей базе.

Индексатор службы Microsoft Windows Search грузит процессор?

Обычно индексатор службы Microsoft Windows Search не грузит процессор. В нашем случае, когда все файлы проиндексированы, нагрузка на центральный процессор составляет 0%, а объём используемой оперативной памяти составляет порядка 80МБ.

Поэтому, если на вашем устройстве индексатор службы Microsoft Windows Search грузит процессор, это означает, что в настоящее время идёт индексирование файлов. Если вы активно пользуетесь устройством, нажимаете на клавиши клавиатуры, водите мышкой, служба Windows Search замедляет скорость сканирования. В нашем случае при сниженной скорости индексирования нагрузка на процессор составляет 0,6-1,2%.

Конечно, нагрузка будет больше, если процессор относительно старый и имеет одно-два логических ядра. Поэтому приведённые значения нагрузки индексатора службы Microsoft Windows Search на процессор следует считать условными.

Как можно уменьшить нагрузку службы Microsoft Windows Search на процессор?

Определяем папки, которые служба поиска должна индексировать

1. Найдите и запустите «Параметры индексирования» в классическом варианте Панели управления.

Как открыть классическую Панель управления?

Несколько простых способов в отдельной статье

1. В открывшемся окне нажмите кнопку «Изменить».

1. Отметьте галочками папки или диски, которые вы хотите индексировать в фоновом режиме. Оставьте пустым квадрат, чтобы не индексировать папку или диск. После выбора индексируемых расположений нажмите кнопку «ОК».

Уменьшив количество папок и дисков в окне «Индексируемые расположения», вы сможете сократить нагрузку индексатора службы Microsoft Windows Search на процессор. Но имейте в виду, что поиск в исключенных расположениях будет долгим. А в случае использования кнопки поиска в панели задач поиск в неиндексированных расположениях осуществляться не будет. Поэтому не старайтесь исключать все папки. Оставьте папки, в которых вы часто используете функцию поиска.

Устанавливаем классический режим поиска

В Windows 10 предусмотрено 2 режима поиска: классический и расширенный. При классическом режиме поиск осуществляется только в библиотеках пользователя и на рабочем столе. Расширенный режим позволяет искать файлы по всему компьютеру, за исключением системных папок. Расширенный режим, как предупреждает операционная система, может снизить уровень заряда и увеличить нагрузку на центральный процессор. Особенно это актуально для владельцев ноутбуков, которым важно, чтобы их устройство проработало в автономном режиме как можно дольше.

1. Перейдите в новые «Параметры Windows» (нажмите на клавиатуре кнопку с логотипом Windows + I ).
2. Нажмите на раздел «Поиск».

1. В левом боковом меню нажмите на «Поиск в Windows».
2. Прокрутите список настроек и выберите параметр «Классический стиль».

Активируем привязку производительности индексатора к параметрам питания устройства

Изменять режим производительности индексатора стало возможным с момента появления Windows 10 версии 2004 (майское обновление 2020 года). Если включить параметр «Использовать параметры режима питания устройства», служба Windows Search будет оценивать, запущен ли на компьютере режим энергосбережения, пониженного электропотребления или игровой процесс. Если да, то служба поиска приостановит индексацию в фоновом режиме.

Также при включении производительности индексатора служба поиска приостановит индексацию файлов в фоновом режиме, если загрузка центрального процессора превысит 80% или загрузка жесткого диска поднимется свыше 70%.

1. Перейдите в новые «Параметры Windows» (нажмите на клавиатуре кнопку с логотипом Windows + I ).
2. Нажмите на раздел «Поиск».

1. В левом боковом меню нажмите на «Поиск в Windows».
2. Прокрутите список настроек и включите параметр «Использовать параметры режима питания устройства».

Отключаем службу Windows Search

Отключая службу Windows Search, вы отключите индексирование папок и файлов в фоновом режиме.

Вы сможете осуществлять поиск по устройству, но он будет медленным.

1. Запустите приложение «Выполнить» (нажмите на клавиатуре кнопку с логотипом Windows + R ).
2. Наберите текст services.msc и нажмите кнопку «ОК».

1. В открывшемся окне найдите службу Windows Search.

1. Дважды нажмите на строку службы «Windows Search». Откроется окно с настройками.
2. Выберите тип запуска «Отключена».
3. Нажмите кнопку «Остановить», чтобы завершить активный процесс выполнения службы Windows Search.
4. Нажмите кнопку «ОК», чтобы сохранить настройки службы.

А как у вас работает служба поиска в Windows? Испытываете ли вы проблемы при ее работе в фоновом режиме?

Расскажите о своем опыте в комментариях 😉

Интерфейс операционной системы Windows снабжен мощным инструментом для поиска файлов и приложений — службой Windows search. Она позволяет пользователям быстро находить нужные файлы, документы, папки и программы, сокращая время на поиск и упрощая работу.

Windows search использует индексирование для создания базы данных файлов и их содержимого. Каждый раз, когда пользователь создает, изменяет или сохраняет файл, служба автоматически обновляет индекс, чтобы отражать эти изменения. Таким образом, при поиске информации Windows search обращается к индексу, а не к реальным файлам, что ускоряет процесс поиска и делает его более эффективным.

Windows search имеет много полезных функций, таких как автоматическое обновление индекса, возможность настраивать параметры поиска, фильтрация результатов по типам файлов и даже возможность поиска на удаленных компьютерах или серверах. Кроме того, служба поддерживает поиск с использованием ключевых слов, фраз и даже операторов.

Благодаря Windows search пользователи могут значительно сэкономить время на поиске нужных файлов и приложений, а также легко управлять своими данными. Независимо от размера жесткого диска или количества файлов, Windows search поможет найти нужную информацию в считанные секунды, обеспечивая более эффективное использование операционной системы.

Что такое служба Windows Search?

Служба Windows Search использует механизм индексации для создания поисковой базы данных, которая включает информацию о содержимом файлов, свойствах и метаданных. Это позволяет службе быстро и точно выполнять поиск по различным критериям, таким как названия файлов, типы файлов, ключевые слова и прочее.

Служба Windows Search активируется по умолчанию на большинстве версий операционной системы Windows и автоматически индексирует основные разделы диска, такие как документы, изображения, музыка и видео. Однако пользователь может настроить индексацию, включая или отключая отдельные директории или расширения файлов.

С помощью службы Windows Search пользователи могут выполнять разнообразные операции поиска, включая поиск файлов и папок на локальных дисках, в сетевых папках, электронной почте и других источниках данных. Она также поддерживает расширенный поиск с использованием фильтров, операторов и других параметров для более точного и узконаправленного поиска.

Работа службы Windows search

Работа службы Windows search начинается с создания и обновления индекса файлов. При первом запуске операционной системы или при добавлении новых файлов, служба начинает сканировать все диски и создает индекс, который содержит информацию о каждом файле на компьютере.

Индекс содержит метаданные о файлах, такие как название, расширение, тип, дата создания и изменения, а также содержимое текстовых файлов. Служба Windows search использует различные алгоритмы и методы для эффективной индексации и обновления индекса.

После создания индекса, пользователь может использовать поисковой запрос для поиска файлов на компьютере. При вводе запроса в поисковую строку, служба Windows search начинает искать соответствующие файлы в индексе и отображает результаты поиска.

Результаты поиска могут содержать не только названия файлов, но и их содержимое. Служба Windows search выполняет полнотекстовой поиск, что позволяет находить файлы, содержащие конкретные слова или фразы.

Служба Windows search также поддерживает расширенные возможности поиска, такие как фильтрация результатов, поиск по типу файла, поиск по дате создания или изменения, а также поиск по другим атрибутам файлов.

Чтобы служба Windows search работала корректно, она должна постоянно обновлять индекс файлов. Однако, иногда пользователи могут испытывать проблемы с поиском, связанные с неправильной работой или остановкой службы. В таком случае, можно попробовать перезапустить службу Windows search или выполнить ее переиндексацию, чтобы исправить проблему.

Преимущества службы Windows search	Недостатки службы Windows search
Быстрый и удобный поиск файлов	Требует ресурсов компьютера для создания и обновления индекса
Поддержка полнотекстового поиска	Может временно замедлять систему при создании или обновлении индекса
Возможность фильтрации результатов поиска	Некоторые файлы могут быть пропущены при индексации, особенно если они находятся в защищенных системных папках

В целом, служба Windows search является полезным инструментом для быстрого поиска файлов на компьютере. Она обеспечивает удобный интерфейс и расширенные возможности поиска, позволяя пользователям легко находить нужную информацию.

Алгоритмы поиска в службе Windows search

Служба Windows search использует несколько алгоритмов для эффективного поиска файлов и данных на компьютере. Эти алгоритмы помогают ускорить и оптимизировать процесс поиска, позволяя пользователям быстро находить нужные элементы.

• Алгоритм индексирования: Перед тем как выполнить поиск, служба Windows search производит индексирование всех файлов на компьютере. Это позволяет создать базу данных, содержащую информацию о местонахождении и содержимом файлов. Алгоритм индексирования оптимизирует процесс загрузки и обновления индекса, чтобы ускорить поиск.
• Алгоритм поиска с использованием индекса: Когда пользователь выполняет операцию поиска, служба Windows search использует индекс для быстрой фильтрации результатов. Этот алгоритм обращается к индексу и ищет совпадения с указанными критериями поиска. Затем он возвращает список результатов, соответствующих запросу пользователя.
• Алгоритм поиска без использования индекса: Если индекс не содержит запрашиваемой информации или если пользователь указывает поиск вне индексируемых областей, служба Windows search использует алгоритм поиска без использования индекса. Этот алгоритм производит поиск путем просмотра содержимого файлов и директорий, и сравнения их с критериями поиска.

Сочетание этих алгоритмов позволяет службе Windows search быстро и эффективно находить нужные файлы и данные на компьютере пользователя. В результате пользователи могут значительно снизить время, затрачиваемое на поиск и организацию своих файлов и документов.

Интеграция службы Windows search с операционной системой

Служба Windows search представляет собой инструмент, предназначенный для быстрого поиска файлов и приложений на компьютере, работающем под управлением операционной системы Windows. Она интегрирована в самую основу ОС и предлагает пользователям удобные возможности для поиска необходимой информации.

Windows search внедрена в операционную систему на разных уровнях. Она индексирует содержимое всех файлов на компьютере, создавая своеобразную базу данных, которая позволяет осуществлять быстрый поиск по ключевым словам. Индексирование происходит в фоновом режиме, чтобы не замедлять работу компьютера в процессе использования.

Интеграция службы Windows search с операционной системой включает в себя не только поиск файлов и приложений, но и других объектов, таких как электронные письма, контакты, события в календаре и даже сообщения в мессенджерах. Благодаря этому, пользователь может легко найти нужные документы, сообщения или контакты, не тратя много времени на их поиск вручную.

Для удобства использования Windows search интегрирована в различные компоненты операционной системы, такие как Проводник, Меню «Пуск» и панель задач. Это позволяет пользователям осуществлять поиск из любой точки ОС без необходимости открывать отдельное окно поиска. Процесс поиска легко осуществляется с помощью ввода ключевого слова в соответствующее поле и нажатия кнопки «Поиск».

Важно отметить, что интеграция Windows search позволяет не только находить объекты на локальном компьютере, но и в сетевом окружении. Пользователи могут осуществлять поиск файлов и приложений на других компьютерах в локальной сети, что существенно упрощает работу в коллективе.

Интеграция службы Windows search с операционной системой делает процесс поиска файлов и приложений удобным и быстрым. Она позволяет пользователям найти нужную информацию мгновенно, сэкономив время и упростив работу с компьютером. Благодаря своей мощности и удобству использования, Windows search является незаменимым инструментом для всех пользователей операционной системы Windows.

Преимущества использования службы Windows search

Служба Windows search предлагает ряд преимуществ, которые делают ее неотъемлемой частью операционной системы Windows:

1. Быстрый поиск информации: Служба Windows search обеспечивает быстрый доступ к файлам и папкам на компьютере. Она индексирует содержимое диска, что позволяет выполнять мгновенный поиск по ключевым словам и фразам.

2. Удобство использования: Благодаря интеграции в проводник Windows, служба Windows search позволяет выполнить поиск из любого места операционной системы — просто введите ключевое слово в поле поиска проводника и результаты будут отображены мгновенно.

3. Полнотекстовый поиск: Служба Windows search анализирует не только названия файлов, но и их содержимое, что позволяет выполнять поиск по словам и фразам внутри документов.

4. Фильтрация результатов поиска: Служба Windows search предлагает различные фильтры для уточнения результатов поиска. Вы можете выбирать файлы по типу, дате создания или изменения, размеру и другим параметрам.

5. Улучшенный поиск в интернете: Служба Windows search интегрируется с поисковыми системами, такими как Bing, предоставляя более удобный интерфейс для выполнения поиска в Интернете.

6. Настройка индексации: Служба Windows search позволяет настроить индексацию определенных папок и типов файлов, позволяя вам выбрать, какие данные должны быть доступны для поиска и какие — нет.

В целом, служба Windows search значительно упрощает поиск файлов и папок на компьютере, экономя ваше время и повышая продуктивность работы.

The search pane in Windows 11 showing suggested/recent files on the left and Bing search on the right.
Developer(s)	Microsoft
Initial release	January 30, 2007; 16 years ago
Operating system	Microsoft Windows
Predecessor	Indexing Service, Windows Desktop Search
Service name	Windows Search (WSearch)
Type	Desktop search
Website	https://support.microsoft.com/en-us/help/17190/windows-10-search-for-anything

Windows Search (also known as Instant Search) is a content index desktop search platform by Microsoft introduced in Windows Vista as a replacement for both the previous Indexing Service of Windows 2000 and the optional MSN Desktop Search for Windows XP and Windows Server 2003, designed to facilitate local and remote queries for files and non-file items in compatible applications including Windows Explorer. It was developed after the postponement of WinFS and introduced to Windows constituents originally touted as benefits of that platform.

Windows Search creates a locally managed Index of files — documents, emails, folders, programs, photos, tracks, and videos — and file contents, as well as of non-file items including those of Microsoft Outlook for which users can perform incremental searches based on details such as authors, contents, dates, file names, file types, people, and sizes; the Index stores actual prose from inside documents and metadata properties from other content. Control Panel and Settings can also be searched.

Windows Search was introduced in Windows Vista as a replacement for the previous Indexing Service to facilitate data discovery and management, promote greater rapidity of search results, and to unify desktop search platforms across Microsoft Windows; it was also available as an optional download for Windows XP. There have been several updates to its functionality since its introduction, and it is also included in Windows 7, Windows 8, Windows 8.1, Windows 10, and Windows 11.

History[edit]

Windows Search is the successor of the Indexing Service, a remnant of the Object File System feature of the Cairo project which never materialized. Microsoft began development of Windows Search after the postponement of WinFS; it introduces features originally touted as benefits of that platform, such as content indexing, incremental searching, and property stacking.

Overview[edit]

Windows Search creates a locally stored index of files and non-file items stored on a computer.

The time required for the initial creation of this index depends on the amount and type of data to be indexed, and can take up to several hours, but this is a one-time event.^[1] Once a file’s contents have been added to this index, Windows Search is able to use the index to search results more rapidly than it would take to search through all the files on the computer. Searches are performed not only on file names, but also on the contents of the file (provided a proper handler for the file type is installed such as a PDF reader) as well as the keywords, comments and all other forms of metadata that Windows Search recognizes. For instance, searching the computer for «The Beatles» returns a list of music files on the computer which have «The Beatles» in their song titles, artists or album names, as well as any e-mails and documents that include the phrase «The Beatles» in their titles or contents.

Windows Search features incremental search (also known as «search as you type»). It begins searching as soon as characters are entered in the search box, and keeps on refining and filtering the search results as more characters are typed in. This results in finding the required files even before the full search text is entered.

Windows Search supports IFilters, components that enable search programs to scan files for their contents and metadata. Once an appropriate IFilter has been installed for a particular file format, the IFilter is used to extract the text from files which were saved in that format.^[2]

By default, Windows Search includes IFilters for common filetypes, including Word documents, Excel spreadsheets, PowerPoint presentations, HTML files, text files, MP3 and WMA music files, WMV, ASF and AVI video files and JPEG, BMP and PNG images.^[3]

Windows Search uses property handlers to handle metadata from file formats. A property handler needs a property description and a schema for the property for Windows Search to index the metadata.^[4] Protocol handlers are used for indexing specific data stores. For example, files are accessed using File System Protocol Handler, Microsoft Office Outlook data stores using the Outlook Protocol Handler and Internet Explorer cache using the IE History/Cache Protocol Handler.^[5]

Architecture[edit]

Windows Search is implemented as a Windows Service. The search service implements the Windows Search configuration and query APIs and also controls, as well as all indexing and query components. The most important component of Windows Search is the Indexer, which crawls the file system on initial setup, and then listens for file system notifications to pick up changed files in order to create and maintain the index of data. It achieves this using three processes:^[6]

1. SearchIndexer.exe, which hosts the indexes and the list of URIs that require indexing, as well as exposes the external configuration and query APIs that other applications use to leverage the Windows Search features.
2. SearchProtocolHost.exe, which hosts the protocol handlers. It runs with the least permission required for the protocol handler. For example, when accessing filesystem, it runs with the credentials of the system account, but on accessing network shares, it runs with the credentials of the user.
3. SearchFilterHost.exe, which hosts the IFilters and property handlers to extract metadata and textual content. It is a low integrity process, which means that it does not have any permission to change the system settings, so even if it encounters files with malicious content, and by any chance if they manage to take over the process, they will not be able to change any system settings.

The search service consists of several components, including the Gatherer, the Merger,^[7] the Backoff Controller, and the Query Processor, among others. The Gatherer retrieves the list of URIs that need to be crawled and invokes proper protocol handler to access the store that hosts the URI, and then the proper property-handler (to extract metadata) and IFilter to extract the document text. Different indices are created during different runs; it is the job of the Merger to periodically merge the indices.^[7] While indexing, the indices are generally maintained in-memory and then flushed to disk after a merge to reduce disk I/O. The metadata is stored in property store, which is a database maintained by the ESE database engine.^[7] The text is tokenized and the tokens are stored in a custom database built using Inverted Indices.^[7] Apart from the indices and property store, another persistent data structure is maintained: the Gather Queue.^[7] The Gather Queue maintains a prioritized queue of URIs that needs indexing. The Backoff Controller mentioned above monitors the available system resources, and controls the rate at which the indexer runs. It has three states:^[7]

1. Running: In this state, the indexer runs without any restrictions. The indexer runs in this state only when there is no contention for resources.
2. Throttled: In this state, the crawling of URIs and extraction of text and metadata is deliberately throttled, so that the number of operations per minute is kept under tight control. The indexer is in this state when there is contention for resources, for example, when other applications are running. By throttling the operations, it is ensured that the other operations are not starved of resources they might need.
3. Backed off: In this state, no indexing is done. Only the Gather Queues are kept active so that items do not go unindexed. This state is activated on extreme resource shortage (less than 5 MB of RAM or 200 MB of disk space), or if indexing is configured to be disabled when the computer is on battery power, or if the indexer is manually paused by the user.

Advanced Query Syntax[edit]

Windows Search queries are specified in Advanced Query Syntax (AQS) which supports not only simple text searches but provides advanced property-based query operations as well.^[8] AQS defines certain keywords which can be used to refine the search query, such as specifying boolean operations on searched terms (AND, OR, NOT) as well as to specify further filters based on file metadata or file type. It can also be used to limit results from specific information stores like regular files, offline files cache, or email stores. File type specific operators are available as well.^[9] Windows Desktop Search also supports wildcard prefix matching searches.^[10] It also includes several SQL-like operators like GROUP BY. AQS is locale dependent and uses different keywords in international versions of Windows 7.

Programmability[edit]

Users can access the Windows Search index programmatically using managed as well as native code.^[11] Native code connects to the index catalog by using a Data Source Object retrieved from the Indexing Service OLE DB provider. Managed code use the MSIDXS ADO.NET provider. One can query a catalog on a remote machine by specifying a UNC path. Programmers specify the criteria for searches using SQL-like syntax. The SQL query can either be created by hand, or by using an implementation of the ISearchQueryHelper interface. Windows Search provides implementations of the interface to convert an AQS or NQS queries to their SQL counterpart.^[12][13]

The OLE DB/SQL API implements the functionality for searching and querying across the indices and property stores. It uses a variant of SQL in which to represent the query (regular SQL with certain restrictions) and returns results as OLE DB Rowsets.^[7] Whenever a query executes, the parts of the index it used are temporarily cached so that further searches filtering the result set need not access the disk again, in order to improve performance. Windows Search stores its index in an Extensible Storage Engine file named Windows.edb that exists, by default, in the \ProgramData\Microsoft\Search\Data\Applications\Windows\ folder at the root of the system drive in Windows Vista or in later versions of Windows. (The corresponding location in Windows XP is \All Users\Application Data\Microsoft\Search\Data\Applications\Windows\ inside the Documents and Settings folder.)

The index store, called SystemIndex, contains all retrievable Windows IPropertyStore values for indexed items.
Within the SystemIndex folder lurk SystemIndex.*.Crwl and SystemIndex.*.gthr files.^[14]
The names and locations of documents in the system are exposed as a table with the column names System. ItemName and System. ItemURL respectively.^[15] A SQL query can directly reference these tables and index catalogues and use the MSIDXS provider to run queries against them. The search index can also be used via OLE DB, using the CollatorDSO provider.^[16] However, the OLE DB provider is read-only, supporting only SELECT and GROUP ON SQL statements.

Windows Search also registers a search-ms application protocol, which can be used to represent searches as URIs.^[17] The search parameters and filters are encoded in the URI using AQS or its natural language counterpart, NQS. When Explorer invokes the URI, Windows Search (which is the default registered handler for the protocol) launches the Search Explorer with the results of the search. In Windows Vista SP1 or later, third-party handlers can also register themselves as the application protocol handler, so that searches can be performed using any search engine which the user has set as default, and not just Windows Search.

The Windows Search service provides the Notifications API component to allow applications to «push» changed items that need indexing to the Windows Search indexer.^[7] Applications use the component to supply the URIs of the items that need to be indexed, and the URIs are written to the Gather Queue, where they are read off by the indexer. Microsoft Outlook and Microsoft OneNote use this ability to index the items managed by them and use Windows Search queries to provide the in-application searching features. The internal USN Journal Notifier component of Windows Search also uses the Notifications API, monitoring the Change Journal in an NTFS volume to keep track of files that have changed on the volume.^[18] If the file is in a location indexed by Windows Search and does not have the FANCI (File Attribute Not Content Indexed) attribute set,^[7] the Windows Search service is notified of its path via the Notification API.

Windows Search Configuration APIs are used to specify the configuration settings, such as the root of the URIs that needs to be monitored, setting the frequency of crawling or viewing status information like number of items indexed or length of the gather queue or the reason for throttling the indexer.^[7][19]
It^{[clarification needed]} also exposes APIs to register protocol handlers (via the ISearchProtocol() interface, property handlers (via the IPropertyStore() interface) or IFilter implementations (via the IFilter() interface). IFilter implementations allow only read-only extraction of text and properties, whereas IPropertyStore allows writing properties as well.^[7]

Windows Desktop Search[edit]

Windows Desktop Search

Windows Desktop Search running in Windows XP, with preview pane showing thumbnails of search results.
Developer(s)	Microsoft
Stable release	4.0 / June 3, 2008; 15 years ago
Written in	C++[20]
Operating system	Windows 2000 Windows XP Windows Server 2003
Type	Desktop search
License	Freeware
Website	www.microsoft.com/windows/products/winfamily/desktopsearch/default.mspx

Windows Desktop Search, a standalone add-on made available as freeware, is the implementation of Windows Search for Windows 2000, Windows XP and Windows Server 2003.

Windows Desktop Search and Windows Search share a common architecture and indexing technology and use a compatible application programming interface (API).

Searches are specified using the Advanced Query Syntax and are executed while the user types (incremental find). By default, it comes with a number of IFilters for the most common file types—documents, audio, video as well as protocol handlers for Microsoft Outlook e-mails. Other protocol handlers and IFilters can be installed as needed.

Windows Desktop Search allows network shares to be added to the index.^[21][22]

User interface[edit]

The Windows Desktop Search functionality is exposed via a Windows Taskbar mounted deskbar, accessible via a ⊞ Win+⇧ Shift+F keyboard shortcut. It provides a text field to type the query and the results are presented in a flyout pane. It also integrates as a Windows Explorer window. On selecting a file in the Explorer window, a preview of the file is shown in the right hand side of the window, without opening the application which created the file. Web searches can be initiated from both interfaces, but that will open the browser to search the terms using the default search engine.

The deskbar also has the capability to create application aliases, which are short strings which can be set to open different applications. This functionality is accessed by prefixing the ! character to the predefined string. For example, «!calc» opens the Windows Calculator. The help documentation includes syntax for creating application aliases out of any text string, regardless of prefix. This feature can also be used to create shortcut for URLs, which when entered, will open the specified URL in browser. It can also be used to send parametrized information over the URL, which are used to create search aliases. For example, «w text» can be configured to search «text» in Wikipedia.

Releases[edit]

Windows Desktop Search was initially released as MSN Desktop Search, as a part of the MSN Toolbar suite. It was re-introduced as Windows Desktop Search with version 2, while still being distributed with MSN Toolbar Suite.

For Windows 2000, Windows XP and Windows Server 2003, it came in two flavors, one for home users and the other for enterprise use. The only difference between the two was that the latter could be configured via group policy. The home edition was bundled with MSN Toolbar, while the other was available as a standalone application. Later, when MSN Toolbar was discontinued in favor of Windows Live Toolbar, the home edition of Windows Desktop Search was discontinued as well. The last version available for Windows 2000 is Windows Desktop Search 2.66.

For Windows XP and Windows Server 2003, version 3.0 of Windows Desktop Search was provided as a standalone release – separate from Windows Live Toolbar. One of the significant new features is Windows Desktop Search 3.0 also installs the Property System on Windows XP introduced in Windows Vista.^[23] Windows Desktop Search 3.0 is geared for pre-Windows Vista users, hence the indexer was implemented as a Windows Service, rather than as a per-user application, so that the same index as well as a single instance of the service can be shared across all users – thereby improving performance. Windows Desktop Search found itself in the midst of a controversy on October 25, 2007, when Windows Desktop Search 3.01 was automatically pushed out and installed on Windows when updated via Windows Server Update Services (WSUS). Microsoft responded with two posts on the WSUS Product Team Blog.^[24][25]

Windows Vista[edit]

Windows Vista and Windows Server 2008 introduced Instant Search in the Start menu and in Windows Explorer.

It offers a superset of the features provided by Windows Desktop Search (WDS), while being API compatible with it. Unlike WDS, it can seamlessly search indexed as well as non-indexed locations – for indexed locations the index is used and for non-indexed locations, the property handlers and IFilters are invoked on the fly as the search is being performed. This allows for more consistent results, though at the cost of searching speed over non-indexed locations. Windows Search uses Group Policy for centralized management.^[26] Windows Search also supports queries against a remote index.

Windows Search indexes offline caches of network shares, in addition to the local file systems. This means if the file server, on which a network file share is hosted, is running either Windows Vista or a later version of Windows or Windows Search 4.0 on Windows XP, any searches against the share will be queried against the server’s index and present the results to the client system, filtering out the files the user does not have access to. This procedure is transparent to the user.

Microsoft Outlook e-mail stores starting with Outlook 2007, though Outlook 2002 and Outlook 2003 and Microsoft OneNote stores are also indexed if installed alongside Windows Search.^[27]

Unlike Windows Desktop Search on Windows XP, the Windows Search indexer performs the I/O operations with low priority, the process also runs with low CPU priority. As a result, whenever other processes require the I/O bandwidth or processor time, it is able to pre-empt the indexer, thereby significantly reducing the performance hit associated with the indexer running in the background.

Windows Search supports natural language searches; so the user can search for things like «photo taken last week» or «email sent from Dave». However, this is disabled by default.^[28] Natural language search expresses the queries in Natural Query Syntax (NQS), which is the natural language equivalent of AQS.

User interface[edit]

The search functionality is exposed using the search bars in the Start menu and the upper right hand corner of Windows Explorer windows, as well as Open/Save dialog boxes. When searching from the Start menu, the results are shown in the Start menu itself, overlapping the recently used programs. From the Start menu, it is also possible to launch an application by searching for its executable image name or display name. Searching from the search bars in Explorer windows replaces the content of the current folder with the search results. The Explorer windows can also render thumbnails in the search results if a Thumbnail Handler is registered for a particular file type. It can also render enhanced previews of items in a Preview Pane without launching the default application, if the application has registered a Preview Handler. This can provide functionality such as file type-specific navigation (such a browsing a presentation using next/previous controls, or seeking inside a media file).^[29] Preview handlers can also allow certain kind of selections (such as highlighting a text snippet) to be performed from the preview pane itself. In the Control Panel, the search bar in the window can also search for Control Panel options. However, unlike WDS, Windows Search does not support creating aliases.

There is also a Search Explorer, which is an integrated Windows Explorer window that is used for searches. It presents the user interface to specify the search parameters, including locations and file types that should be searched, and certain operators, without crafting the AQS queries by hand. With Windows Vista SP1, third-party applications will be able to override the Search Explorer as the default search interface so that the registered third-party application will be launched, instead of bringing up the Search Explorer, when invoked by any means.^[30]

It is also possible to save a search query as a Virtual Folder, called a Saved Search or Search Folder which, when accessed, runs the search with the saved query and returns the results as a folder listing. Physically, a search folder is just an XML file (with a .search-ms extension) which stores the search query (in either AQS or NQS), including the search operators as well. Windows Vista also supports query composition, where a saved search (called a scope) can be nested within the query string of another search.^[31][32] Search Folders are also distributable via RSS. By default, Windows references the profile of the user who originally created a Search Folder as part of the query’s scope.^[33] This design choice does not prevent saved searches from being shared with other users, but it prevents them from operating on different user profiles. While users can manually modify the contents of a saved search so that the scope references the %USERPROFILE% environment variable, which will enable it to operate on other machines or profiles regardless of the original author, Microsoft has released a SearchMelt Creator utility that automates this process for the user.^[33]

Windows Search 4.0[edit]

Windows Search 4.0 (also previously referred to as Windows Live Search, codenamed Casino or OneView) is the successor to the Windows Search platform for both Windows Desktop Search 3.0 on Windows XP as well as Instant Search on Windows Vista. It is mainly an update to the indexing components, with few changes to the Windows XP user interface and none on Windows Vista. It added remote query support to Windows XP and Windows Server 2003 based systems, which used to be a Vista-only feature. This allows a user with a Vista client (or an XP client with Windows Search 4.0) to search the index of networked machines which are also running a supported operating system.

Windows Search 4.0 was originally proposed by Microsoft’s Windows Live division as an application that would unify local and remote indexed search^[34] in a new interface. Early screenshots of the program featured the new «flair» interface design seen in other Windows Live client applications of the time such as Windows Live Messenger and Windows Live Mail.

Windows Live Search Center could search web services which used the OpenSearch specification to make search results available as web feeds.^[35] It could aggregate searches from various indexes including the Windows Desktop Search index, Windows RSS Platform common feed store, and Microsoft Exchange and Microsoft SharePoint indexes, among others.^[36]

The first beta of Windows Search 4.0 was released on March 27, 2008.^[37] It included numerous performance improvements to the indexer and brought new features, including previously Vista-exclusive ones, to XP, including Group Policy integration, federation of searches to remote indexes, support for EFS-encrypted files and Vista-style preview handlers that allow document-type specific browsing of documents in the preview pane.^[38][39]

Windows Search 4.0 was released on June 3, 2008, and is supported on XP, Windows Server 2003, Vista, Windows Server 2008 and Windows Home Server.^[39][40]

Windows 10[edit]

In Windows 10, Windows Search was added to the taskbar in place of the Start menu in earlier versions of Windows.

A new landing page was added showing users their top apps and recent activities on their computer.^[41][42]

The landing page also provides quick searches provided from Bing for the weather, top news stories, today in history and new movies.

The landing page also serves as a space that Microsoft can advertise in, such as with the new Chromium-based version of Microsoft Edge.

A preview pane from within the Search UI was added that supports apps and documents. When searching for a program, the taskbar jumplists for each program are shown in the preview pane and when searching for documents, file metadata such as file location, date last modified and the document author was also added.

The landing page allows the user to filter searches depending on whether the user looking for documents, pictures or settings.

Spell-correction was also added to Windows Search when searching for Apps & Settings to ensure a wider range of results were shown.

The search box in File Explorer now opens as soon as you click in the box and provides a dropdown of recent searches. Microsoft OneDrive content is also now integrated in addition to the indexed results.^[43] When clicking on the search result, the file will open immediately. Each search result also has a right click menu allowing the user to open the file’s location.

Privacy Concerns[edit]

The Windows Search index is built locally on the PC and no information is sent to Microsoft.^[44]

See also[edit]

• Enterprise search
• List of desktop search engines
• Microsoft Outlook
• Microsoft Search Server

References[edit]

Further reading[edit]

External links[edit]

• iFilter.org