Windows users many times face problem of handling file type associations. You may have noticed that after installing a program, that program may have changed file association that you may not be happy with. Sometimes viruses or malicious programs can also add or change file associations that you may don’t even notice.
To change file association in Windows 7, you can just right-click on the file and select Open with, then select Choose default program. This process is easy but removing a file association is not that easy.
Reset/Remove File Associations in Windows
Enter Unassoc, a small and lightweight program to unassociate file types in Windows 7 and Vista. With this program, you won’t ever need to use the registry editor or command prompt to manually change file association.
Unassoc is a free and portable tool for Windows that can easily remove file type association. After downloading the zip, you just need to extract the contents and run Unassoc.exe.
The interface is very simple, with buttons on the right side. The “remove file association (User)” button is only visible if the file association is set by the user or by any program that was installed on the computer. Clicking on this button will reset the file type association or change the file type to unknown if Windows did not support that file type.
The “Delete file type” button will delete that file type and it will also remove its association from the system. This means you’ll be presented with open with dialog box, as Windows won’t be able to open that file type any longer.
To use this program, just search for the file type and click on the respective button to perform the function. This tool also comes in handy when you want to change multiple file associations in Windows.
Unassoc works in Windows Vista and Windows 7 only. You’ll need to run this program with administrative privileges. Get it from below link.