Как удалить ассоциацию файла в windows 7

asked Oct 1, 2009 at 15:37

1. Find the file extension in question under this key in the registry:

   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts

   Deleting the sub-key with the same name as the extension you want to un-associate will delete the default program association. In older Windows versions, you’ll have to kill and restart explorer.exe for this to take effect (the change is instant as of Windows 10 64-bit).

2. In most cases, you will also need to remove the same sub key from HKEY_CLASSES_ROOT as well.

Even easier method that I found, it just requires the command line.

1. Open a command prompt with Administrator privileges (right click > Run as Administrator).
2. Run the command assoc .<file_extension> in the prompt. This will give the file type which is associated with the extension. If this command returns File association not found for extension .<file_extension>, it means the extension is not associated with any file type. If it returns an association value in format .<file_extension>=<Some Value> , then go to Step 3.
3. Run the command ftype [FileType]= , where FileType is the file type returned in Step 2.

Special thanks go to My Digital Life for the instructions that I used to figure this one out. They also included a step that disassociates the extension from the file type, but based on what you are looking for, that isn’t strictly necessary.

eselkeselk

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In Explorer, go to Tools | Folder Options | File Types, find the extension you’re looking for, and click Delete.

Or, if Delete is grayed out, click Restore (to set it back to the defaults), then Delete.

answered Oct 1, 2009 at 15:51

Why not use this method here:

http://pcsupport.about.com/od/fixtheproblem/ht/default-program-windows-7.htm

Follow these very easy steps for changing the program that starts when you open a particular kind of file in Windows 7.

Here’s How:

1. Click on Start and then Control Panel.

   Tip: In a hurry? Type associations in the search box after clicking the start button. Choose __Make a file type always open in a
   specific program_ from the list of results and then skip to Step 4.

2. Click on the Programs link.

   Note: If you’re viewing the Small icons or Large icons view of Control Panel, you won’t see this link. Click on the Default
   Programs icon and then click on the Associate a file type or
   protocol with a program link. Then proceed to Step 4.

3. Click on the Make a file type always open in a specific program link under the Default Programs heading.

4. In the Set Associations window, scroll down the list until you see the file extension that you want to change the default program
   for.

5. Click on the file extension to highlight it, once you’ve found the one you’re looking for.

6. Click the Change program… button above the scroll bar.

   The Open With dialog box should appear.

7. Look through the options in the Recommended Programs area and choose the application that you want to open the file extension with
   when you double-click on the particular kind of file on your computer.

   Note: Chances are, the applications listed under Recommended Programs will contain the most applicable programs for this file type
   but be sure to look at the applications under Other Programs. You
   may need to click the v to expand the list of these programs.

   Note: Click Browse… to search through your computer for any program not listed that you’d like to use.

8. Click the OK button on the Open With window. Windows 7 will refresh the list of file associations to show the new default program
   to open this type of file.

9. Click the Close button at the bottom of the Set Associations window. You may also close the Control Panel window if it’s still
   open.

10. From this point forward, when you double-click on any file with this particular file extension, the program you associated it with in
    Step 7 will launch and load the particular file.

    Important: Whatever program used to automatically open when these types of files were launched will still open these types of
    files. To use another program, you’ll just need to start the program
    manually and then browse your computer for the particular file.

binaryfuntbinaryfunt

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answered Nov 8, 2015 at 4:51

I did the brute-force ignorant method. Delete all registry keys that have the extension mentioned in them, as well as delete all the registry keys that have the previous application (bar.exe) mentioned in them.

Assuming the extension is .foo and the application is bar.exe, I think I found stuff here

 HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.foo
 HKEY_CLASSES_ROOT\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.foo
 HKEY_USERS\foo_auto_file
 HKEY_CLASSES_ROOT\Applications\bar.exe

as well as some other stuff that did not seem helpful to delete (a lot of MRU lists)

And I may have had to logout/login as well, although I’m not sure if that was 100% necessary.

answered Apr 19, 2013 at 22:02

answered Jul 9, 2015 at 12:24