Windows Vista/7: How to delete file extensions/associations

Within Windows XP it is so easy to delete an file extension:


But in Windows Vista/7 this is not so easy anymore:


Maybe it is concerning security or system stability, but whatever it is, it is a drawback for IT professionals…

So how to delete it?

There are two ways:

1.) Search the whole registry for that file extension and delete the entries or delete that extensions at this common file extensions places:





2.) Use UNASSOC (<-Click to reach the download page):


REM: Some users state that ASSOC and FTYPE within the Command Prompt should help too but I cannot confirm that…

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