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

Run Command Prompt or PowerShell  as administrator and enter the following 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

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