A Utility to Unassociate File Types in Windows 7 and Vista


Here is a utility that helps you unassociate a file type quickly in your Windows Vista or Windows 7 computer without the need to edit the registry manually. Windows 7 & Vista do not provide a GUI option to unassociate file types, thus the need arises for such a tool below.

Unassociate file types in Windows 7 & Windows Vista

  • Download unassoc.zip and save to Desktop
  • Extract the contents to a folder and run the file unassoc.exe
  • Select the file type from the list
  • Click Remove file association (User)

The user-specific association for the chosen file type is now removed from the registry. The system will now use the global file association settings.

More information

CommandDescription
Remove file association (User)Removes the user-specific association (via the Open With dialog) for the chosen file type. Note that this button will remain dimmed if there is no user-specific association for the file type.
Delete file typeDeletes the file type completely from the registry. Both the user-specific and global associations for the chosen file type is removed.
Refresh listRefreshes the list box contents.

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188 Comments

  1. Helina Michalak
    said this on Tuesday, February 3rd 2015 10:01 pm

    Awesome fix! The normal microsoft ones wouldn’t work :)

  2. Brad
    said this on Tuesday, January 27th 2015 12:32 pm

    Unfortunately, with WIN 2012R2 this program couldn’t be launched.
    It says: This program runs in Windows 7 & Vista systems only..

  3. renezito
    said this on Friday, January 23rd 2015 12:08 am

    Yes! This tool is great. I could remove file association that doesn’t let me do assoc cmd line.
    Thanks!

  4. said this on Wednesday, January 21st 2015 5:10 am

    awesome mate, thanks. the usual windows programs couldnt change the association, but deleting it with this utility fixed it. well done, and thanks

  5. apstuff
    said this on Saturday, January 17th 2015 12:16 am

    Thank you for this utility. Worked great. Appreciated.

  6. singalgi
    said this on Tuesday, January 13th 2015 11:47 pm

    thank you very much. just seconds of application and its back to original settngs.

  7. yog
    said this on Friday, December 19th 2014 4:24 pm

    Thanks sir I very thanks full for your suggestion
    it really good and work 100%
    thaks

  8. twofei
    said this on Sunday, December 14th 2014 9:34 pm

    It cannot run on my newly installed windows 10 technical preview (9879), because it requires .Net, but I don’t want to install it.
    If only I know how to do these things, or I will write a c code to handle this stupid thing.

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