Repair Windows 10/11 with Three DISM Commands

Windows · January 2026 · 4 min read

Repair Windows 10 and 11 with DISM commands

DISM (Deployment Image Servicing and Management) can quickly check and repair the Windows system image. Run these three commands in an elevated PowerShell or Command Prompt window to diagnose and fix corruption on Windows 10 or Windows 11.

When should you use DISM?

  • Windows Update keeps failing or rolling back.
  • System File Checker (SFC) cannot fix corruption.
  • You see unexplained crashes, missing files, or UI glitches.

Before you start

  • Open PowerShell or Command Prompt as Administrator.
  • Keep a stable internet connection so RestoreHealth can download clean files.
  • Optional but recommended: create a restore point or backup first.
  • Close heavy apps to avoid interruptions.

1) Quick check for flagged corruption

Fast status check to see if the image is flagged as corrupted.

dism /Online /Cleanup-Image /CheckHealth
If DISM reports no corruption, you can still run the deeper scan below to be sure.

2) Deep scan for corruption

Thorough scan that logs any issues without repairing yet.

dism /Online /Cleanup-Image /ScanHealth
This step can take several minutes. It only reports problems; it does not fix them.

3) Repair the system image

Downloads known-good files from Windows Update and repairs detected corruption.

dism /Online /Cleanup-Image /RestoreHealth
If you are offline or Windows Update is blocked, point DISM to a local ISO source instead:
Dism /Online /Cleanup-Image /RestoreHealth /Source:D:\sources\install.wim /LimitAccess

Common DISM errors and fixes

  • 0x800f081f / source files could not be found: Mount a Windows ISO that matches your build and use the /Source option.
  • 0x800f0906: Check internet access and make sure Windows Update is not blocked by policy.
  • DISM stuck at 20% or 40%: Wait it out; this can take 10–30 minutes on slower disks.

Optional: run System File Checker

After DISM finishes, run SFC to repair any remaining system files:

sfc /scannow

Verify the results

  • Rerun dism /Online /Cleanup-Image /CheckHealth to confirm no corruption is reported.
  • Check the DISM log for details: C:\Windows\Logs\DISM\dism.log.

Best practices

  • Run DISM before SFC when you suspect system image corruption.
  • Keep your Windows ISO updated so the /Source files match your version.
  • Restart after repairs to ensure system files reload correctly.

YouTube walkthrough

Wrap up

These three DISM commands let you quickly check, scan, and repair the Windows system image without reinstalling the OS. Keep them handy for routine maintenance or whenever Windows starts acting up.