DISM checks or repairs the Windows component image; SFC checks protected system files. They are useful for some corruption symptoms, not every hardware or driver fault.
Protect your files first
Back up important files when possible. If the drive is encrypted, locate the BitLocker recovery key before recovery changes. Stop if storage appears to be failing or this is a work or school managed PC.
When this guide applies
DISM checks or repairs the Windows component image; SFC checks protected system files. They are useful for some corruption symptoms, not every hardware or driver fault.
Check the exact Windows version and whether the PC is managed by a workplace or school before following instructions.
Steps
Back up files and open an elevated Command Prompt in a booted Windows session. Microsoft’s sequence is DISM /Online /Cleanup-Image /RestoreHealth, then sfc /scannow. Read each result before repeating or escalating.
Record the result of the step before deciding whether to continue. A failed step is diagnostic evidence; it does not automatically justify a reset or reinstall.
Copy the commands
DISM /Online /Cleanup-Image /RestoreHealthsfc /scannowRun each command only in an elevated Command Prompt in a booted Windows session. This does not apply as written to an offline installation.
Limits and stop points
Do not run the /Online command against an offline Windows installation in WinRE. An unstable drive calls for data protection first.
If the result does not match the guide, use the official reference below or contact the device maker with the exact error and steps already attempted.
Keep track of your checks
This checklist stays in this browser session. It is not sent to WinErrors.