1. Join Date : Jan 2015
    UK, Midlands
    Posts : 6,204
    Win 10 Pro (1607)
       4 Weeks Ago #1

    System Restore fails: AppxStaging %ProgramFiles%\WindowsApp 0x80070091

    Hi, thought I'd check if System Restore was still functional and got

    System Restore did not complete successfully. Your computer's system files and
    settings were not changed.

    System Restore failed while restoring the directory from the restore point.
    Source: AppxStaging
    Destination: %ProgramFiles%\WindowsApps
    An unspecified error occurred during System Restore. (0x80070091)

    I found SFC /scannow failed, so used Kyhi's excellent Image Health tool
    Windows 10 Recovery Tools - Bootable Rescue Disk - Windows 10 Forums
    to resolve DISM issues and get SFC /SCANNOW passing.

    System Restore still fails.

    I've run some repairs using Tweaking.com's repair tool for permissions, turned System Restore off and on, turned off Avast, tried System restore from Safe Mode. The event log contains nothing useful I've seen- just a bare statement of An unspecified error occurred during System Restore. (0x80070091).

    Research shows some reports of this, but I've found no clear resolution.
    This exact report was posted on this forum earlier this year, with no replies.
    I've not done anything to %ProgramFiles%\WindowsApps like changing its ownership as some do.

    Any thoughts? Thanks!
      My System SpecsSystem Spec

  2. Join Date : Feb 2015
    Bamberg Germany
    Posts : 13,386
    Microsoft Windows 10 Pro 64-bit 14393 Multiprocessor Free
       4 Weeks Ago #2

    I have given up using System Restore years ago, as I found it very unreliable, back when I was testing 3rd party software.
    Now I just export the complete registry using RegEdit, before doing something.
    But seeing you have Tweaking.com's Windows Repair, you can use that to do it too.
    Click image for larger version. 

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      My System SpecsSystem Spec

  3. Join Date : Jan 2015
    UK, Midlands
    Posts : 6,204
    Win 10 Pro (1607)
       4 Weeks Ago #3

    Hi Cliff S, appreciate the thought.. and understand it. And naturally I use Macrium R for disk imaging.

    In this instance I'm curious, since it relates to the WindowsApps folder. Begs the question as to what SR is intended to protect as regards the universal apps.
      My System SpecsSystem Spec


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