Windows 10 Upgrade Failures

Last Modified

Thu Sep 20 15:24 GMT 2018

Description

  • When patching Window 10 feature updates (upgrades) they can fail with an error code 50 or 87.
  • This error can be found @ C:\Program Files (x86)\N-able Technologies\Windows Agent\log\PatchInstall.log

Environment

  • N-able N-central

Solution

  • One of the main reasons for these 2 errors is Windows still has the old restore folder mounted (C:\$WINDOWS.~BT\)
  • Existing mounting can be unmounted by DISM command, or just delete this key in registry if unmounting doesn't work.
  • You can also clean up this folder if you don't plan on restoring back to an older version, more information can be found here:
  • If problems persists, delete sub keys of "Mounted Images" registry key, which can be found here:
    • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WIMMount\Mounted Images