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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159 Comments

  1. lexi
    said this on Saturday, August 23rd 2014 7:11 am

    Thank you! Thank you! I hope I found this post sooner. Awesome!

  2. Mel
    said this on Wednesday, August 20th 2014 3:39 am

    Super cool.. thanks a lot!

  3. Randy
    said this on Tuesday, August 19th 2014 8:15 pm

    Outstanding, makes you wonder how this isn’t a standard feature, especially since Win7 likes to default to always open with and makes the file association so easy, but not so easy to unassociate. Thanks.

  4. Costas Georgatos
    said this on Thursday, July 31st 2014 1:09 am

    Works like a charm! Many thanks!!!

  5. jhansi rnai
    said this on Tuesday, July 22nd 2014 3:22 pm

    thanks a lot. It worked for me.

  6. Pebbles
    said this on Wednesday, July 9th 2014 6:12 pm

    Thanks a million for solving.

  7. Krishna
    said this on Wednesday, July 9th 2014 8:09 am

    THANKS SO MUCH..This really saved me from a lot of headaches.. thank u

  8. K-Anne
    said this on Saturday, July 5th 2014 7:30 am

    Nice! Instant fix! Thanks soooo much.

  9. khalid
    said this on Saturday, July 5th 2014 2:37 am

    many thanks, this is the best and easiest way
    i had the same problem and this saved me

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