How to remove File Type associations in Windows OS


  1. This utility is great!
    I had a .msp file linked to Paint Shop Pro instead of the Msiexec. So I could not apply the patach easily. Using this to remove the association to ‘explorer.exe’ (a Rookie association mistake) worked beautifully.

  2. I figured it out for windows 7. the steps are as follows:
    1. Open an elevated command prompt.
    2. type assoc .ext= none .ext needs to be replaced with the file you want to unassociate.
    3. press enter, this should do it, hope it works

  3. I had no success with this method – got an error message. Do you remember exactly what you typed at the prompt (spaces & all)?

  4. It’s been a while, but I think I did the exact same thing that he posted up there. Sorry if that didn’t work for you.

  5. Thanks for the reply. I’m still looking for a solution & will post if… er, when I find one 😉

  6. How to dissociate File Types in Windows 7 / 8
    Oh wait it says “FOR WINDOWS 7 & VISTA”

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