Fix Windows 10 Update Failures, e.g. Error 0x800f081f

Try running DISM and SFC commands to repair Windows system files. Once complete reboot and try running the update again.

DISM /Online /Cleanup-image /RestoreHealth

SFC /Scannow

DISM (Deployment Image Servicing and Management) manages both Windows Online and Offline Images and repairs system files

  • /Online switch instructs DISM to target the running Operating System instead of an offline Windows image (.wim) file or virtual hard disk (.vhd or .vhdx)
  • /Cleanup-Image switch performs cleanup and recovery operations on the running Operating System
  • /Restorehealth switch scans the running Operating System for corrupt files and attempts to fix them

SFC (System File Checker)

  • /Scannow will scan all protected system files, and replace corrupted files with a cached copy that is located in a compressed folder at %WinDir%\System32\dllcache

The above procedure also fixes Windows Defrag not running properly due to corrupt system files.

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