Unable to change Default Program Extension on Windows 10

23 Comments

  1. Thanks! I was having a problem where all .theme files opened up with explorer.exe. I am going to change it to shell32.dll after reboot.

  2. Wow, nice job. I hope I never have this problem, but if I ever do, at least I know what to do, that is if I can find this article again!

    Thanks for sharing your experience.

  3. Thanks for this! I somehow associated my video files to open with windows explorer and it wouldn’t let me change it.

    Deleting that registry key did the trick though, so thanks again!

  4. sir all the program of my system have been defaulted to window media center.. if i try to open any program in my system its opened by w.media center. like opera, Google chrome, system restore, please help me out

  5. hey how could i able to delete that registry key..??

    all the program of my system have been defaulted to window media center.. if i try to open any program in my system its opened by w.media center. like opera, Google chrome, system restore, please help me out

  6. You did it! All the Windows forums couldn’t help me at all. Extensions were ghosted out in all the default programs and file associations tools, or when I’d change the default program to open the extension, nothing would work. I then found this permissions problem. This was happening with .WAV files. Unassociated the extension, and re-associated, and it finally works!

  7. Hats off to ShyamS@TWC for this most useful ‘unable to change default program’ howto guide. Took me straight to the solution at this end. Good show.

  8. Oh my gosh I spent HOURS trying to fix this, sooo frustrating and this solution worked! I am so nervous about working with registry keys but the backup and system restore point ideas gave me the confidence I needed to try this out and it worked like a bomb! THANK YOU SOOO MUCH!!!!!

  9. It is good thing, I had same problem but now solved. I made one change at FileExts… I simply found the extension type that was creating problem and deleted its complete value from registry. Next time I opened that program without restarting system and problem was solved.

    Thanks…

  10. Thankyou very much Captain Jack!!! I was facing this same problem and It was very annoying. Your solution worked for me. Thanyou!

  11. what file?
    I deleted userchoice, restarted the computer, and no box showed up…(yes I realize this was 2 years ago)

  12. Had an association with .iso’s to an incompatible software left over from upgrade to windows 10.. Your fix worked a treat and the default mount option returned since I could not manually associate iso’s with the explorer exe!

  13. This made my day.
    All .jpg files were opening in “Microsoft Office 2010” on my Windows 7 machine. I could not change the default program via normal means. Then l I found this solution.
    Thanks!

  14. This worked like a charm!
    Somehow I had .dwg files defaulted to Solidworks, and it wouldn’t let me switch the program.
    It was driving me bananas!!

    Thanks Captain Jack!

  15. You make my day! I spent hours trying to fix pdf ext issues in explorer in Windows 10 October 2018 Update. (clean installation) Thanks.

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