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
| Command | Description |
| 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 type | Deletes the file type completely from the registry. Both the user-specific and global associations for the chosen file type is removed. |
| Refresh list | Refreshes the list box contents. |
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thanks its works !!!!!
Like the above, my Windows 7 computer was also really messed up after all of my links and shortcuts tried to open the programs using paint.exe.
Your Unassoc.exe program worked a treat within only a few seconds, thank you!
Thank you so very much for developing a free solution that solved the problem.
Microsoft should provide the functionality to achieve this result within their ‘Set Associations’ program and should also not set the ‘Always use this program by default’ to true which caused the problem in the first place!
My computer was really messed up after all my links and shortcuts tried to open with word.
Unassoc.exe saved my butt.
Thank you very much.
wow, really thank you…what a potential nightmare that could have been