Last update caused all custom file associations to reset to defaults

By pjfarr
Feb 10, 2016
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  1. My PC updated Windows 10 yesterday afternoon ("Cumulative Update for Windows 10 Version 1511 for x64-based Systems (KB3135173)". After rebooting, it completely screwed all my custom file associations (mostly for media files: photos, audio, and video).

    A few minutes after the reboot, the Action Center started firing popups at me, one after the other, every few seconds:

    "An app default was reset. An app caused a problem with the default setting for .avi files so it was reset to Films & TV."

    with a different file extension for each popup (avi, bmp, mp4, and so on) . Even .pdf files were changed from Adobe Reader to Microsoft Edge. As well, all my custom context menu items for these same file types were also deleted. I spent a lot of time setting these associations up and now they were all obliterated. I'd backed them all up in a .reg file but running it didn't do anything. So with a heavy (and angry) sigh I started manually changing the associations back to the way I had them. However, each time I finished making a change within seconds the Action Center would fire the same message as before at me for the file type I'd just changed and it would be reset back to the MS default again.

    Finally in exasperation, I just used System Restore to go back before the updates and that solved the problem. Now, the Action Center keeps nagging me to set a time to reinstall this same update. I know I can't block it indefinitely, and there are probably important security patches in it I should have. So the question is: How can I stop it from f'ing up my file associations again?

    A Google search indicated others were having this same issue, but so far no one's figured out how to stop it.
  2. jobeard

    jobeard TS Ambassador Posts: 11,168   +986

    It's understandable, but ever so reprehensible to reset the defaults when there's fundamental changes - - I'd be P***ED too!
    even more so when the user takes action to recreate their PERSONAL CHOICES - - oops, I forgot this is MS$
  3. pjfarr

    pjfarr TS Rookie Topic Starter Posts: 24


    Realizing that all the default apps that were hogging the media file types were Windows Metro apps (“Films & TV”, “Photos”, “Groove Music”, etc.) I found this tutorial on how to uninstall and remove all the apps that ambushed my custom file associations (I’d never used those apps anyway). I figured if the apps were gone it would free up those file types. After removing the apps, my custom file associations reappeared, without having to manually set them up again. So far everything seems fine now. Here are the specific apps I removed to recover control of photo, audio, and video file types and the commands to remove them:

    In an elevated PowerShell window, cut & paste each line, pressing ENTER after each entry:

    Get-AppxPackage *zunemusic* | Remove-AppxPackage
    Get-AppxPackage *zunevideo* | Remove-AppxPackage
    Get-AppxPackage *photos* | Remove-AppxPackage​
    Last edited: Feb 12, 2016

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