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I have a problem with modern UI apps. After investigating a bit, I narrowed it down to the file picker not appearing. This results in a number of problems, as:

  • unable to open file in Music app
  • unable to change lock screen background
  • unable to browse through files&folders using third party modern UI apps

and possibly others I have yet to discover.

What I've tried already:

  • removing third parties from startup and services
  • cleaning registry with a software suggested from a Microsoft MVP (can't recall wich sw it was, but I can find it if necessary)
  • using the dedicated app troubleshooter (no results, only suggested to update graphics drivers which were already up to date)
  • running sfc /scannow (found and fixed problems, but didn't manage to solve my issue)
  • running chkdsk /f on the system drive (found nothing)

I've been suggested to make system refresh / wipe and clean install. I utterly refuse to go through the hurdle of reinstalling all of my software just for this, but any other nondestructive solution is really really (really) welcome.

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Sometimes the file picker pops up after 5 or 6 seconds. How much time did you wait? –  pratnala Dec 15 '12 at 14:14
    
Sometimes, as in my case, it never does.. or it crashes the app trying to display it, which also happens to some apps but I forgot to mention. –  restInPieces Dec 16 '12 at 11:25
    
Just to make sure, did you restart after sfc /scannow? –  pratnala Dec 16 '12 at 11:26
    
Yes, many times since then –  restInPieces Dec 16 '12 at 12:06

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