Linked Questions

13
votes
5answers
55k views

Remove file type associations in Windows 7 [duplicate]

I have set up a custom file association for .cfg to open in WordPad, but I can't seem to figure out how to remove it. How do I remove file associations in Windows 7?
6
votes
1answer
38k views

How to delete a file association? [duplicate]

I'm having problem with Team Foundation Server (TFS) when viewing .cs files and need to delete the file association with .cs in Windows 7. At the moment I go to Control Panel -> Default Programs ...
1
vote
1answer
2k views

Change back to 'Windows can't open this file' (Change Windows Default Programs and File Type Associations) [duplicate]

I opened an unknown application with Notepad++ and now every file with that extension is opened by Notepad++ (it was set to always use the selected program to open this kind of file). How do I remove ...
0
votes
1answer
1k views

Restore Windows file extension to default [duplicate]

I had a file that Windows did not recognize. It was called abc.per. This is the correct extension for the file. The file does not open in any known Windows programs either (this is also not a problem)....
1
vote
0answers
128 views

How can I revert file association to default [duplicate]

I have tried to open ex4 file by double clicking but could not open it and the dialog box pop up says to find appropriate program from the web. Meanwhile I tried to open the file with 'notepad' by ...
-1
votes
1answer
114 views

Cannot run regedit to fix registry problems [duplicate]

I cannot run regedit or any other exe programs after I used by mistake the command open with windows media center by default. Everything is opening with wmc and I cannot repair anything. please help!
65
votes
11answers
100k views

How do I restore .bat files association with the system (make them run when double-clicked)?

What do I set the 'Opens with...' property to in order to get the system to run .bat files again (when they are double-clicked)? Somehow my boss convinced his workstation that the handler for .bat ...
29
votes
4answers
85k views

Remove file associations on Windows 8

I have Chrome associated with .xlsx file on a Windows 8.1 machine. In Control Panel\Programs\Default Programs\Set Associations it is not possible to remove an association only to change it to ...
10
votes
3answers
33k views

How to force a file association in Windows 7? (Regedit?)

I recently upgraded my Adobe CS4 Des. Standard to CS5. For some reason Adobe didn't overwrite CS4 but instead installed CS5 as a whole new series of programs. Seeing as I didn't want both CS4 & ...
8
votes
5answers
15k views

How do I dissociate a program from a file type?

If I have a file with the extension .class and I opened it with Notepad. How do I destroy that association so that Notepad is not associated with the .class file type? I do not want to change the ....
0
votes
5answers
14k views

Restore .psd thumbnails in Windows 10 by removing default file association in registry

After upgrading from Windows 8.1 to 10, I noticed that .psd Photoshop files started having thumbnails again, something I've not seen since CS2. Once I tried to open a .psd, it asked me which app I'd ...
3
votes
1answer
6k views

Fully remove a default program association for file types in Windows 10?

Not a single answer from here worked for me. I want to delete the .resource association with Total Commander. Approach 1 I open registry, go to HKEY_CURRENT_USER\Software\Microsoft\Windows\...
3
votes
1answer
1k views

Is there a way to not have a default application for a file type in Windows 7

The situation: My wife is a hobby photographer and likes to view/edit her pictures on the Computer (Windows 7 professional) she uses 4-5 different programs to handle the pictures. I told her the ...
2
votes
2answers
1k views

How do I change the default program (aka file assocation) when the program has moved?

In Windows 7, if I have already associated a program, say Notepad2.exe, with a filetype, say .txt then moving the path to Notepad2.exe (e.g., moving the folder) breaks the association. The problem I ...
3
votes
2answers
402 views

How to make Windows Explorer treat a file with a `.MAS` extension as a regular file

I have a regular file on a Microsoft Windows 7 computer called MYFILE.MAS, as viewed from (e.g.) cmd.exe. (You can create one too, it's just an empty file). However, when viewing this file graphically ...

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