Windows 11

Check Windows system files

SFC can check protected Windows system files without repairing them.

TRY THIS FIRST

Run a verification check

Open PowerShell as administrator and paste the command below.

Diagnostic check · Administrator required · Writes logs; does not repair

PowerShell

sfc.exe /verifyonly

Result: Use what you find to choose the next step.

Still not working?

If integrity violations are reported, use the guide’s repair steps. The repair option /scannow changes system files; verification alone does not fix them.

Check the result: Repeat the original task after making one relevant change. If the problem returns, keep the exact message and time.

More detail →

Sources & page details

Hanki's detailed guide · Reviewed 2026-09-26

Choose the entry that matches where the error appeared. A code alone does not identify every cause. Commands are copied for you to review; this page does not run them.