Fix Corrupted System Files Using SFC /scannow

[Luckyy]

How to Use sfc /scannow to Repair Windows​

The System File Checker (SFC) is a built-in Windows tool that scans for and restores corrupted system files.

When to Use It​

• Random crashes or freezes
• System file corruption
• Missing Windows features
• Programs not launching correctly

​

1. Open Command Prompt as Administrator​

1. Click Start and type cmd
2. Right-click Command Prompt
3. Click Run as administrator

2. Run the SFC Scan​

In the Command Prompt window, type:

sfc /scannow

Then press Enter.

3. Wait for the Scan to Complete​

This may take 10–20 minutes. You'll see a progress message.

4. Check the Result​

You may see one of the following results:

Message	Meaning
Windows Resource Protection did not find any integrity violations.	No issues detected.
Windows Resource Protection found corrupt files and successfully repaired them.	Some issues were fixed.
Windows Resource Protection found corrupt files but was unable to fix some of them.	Some files could not be fixed automatically.

If SFC Can't Fix Everything​

You can run the DISM tool to fix deeper issues:

DISM /Online /Cleanup-Image /RestoreHealth

Then reboot and run sfc /scannow again.

Optional: View Detailed Log​

To create a summary log file on your desktop:

findstr /c:"[SR]" %windir%\Logs\CBS\CBS.log > "%userprofile%\Desktop\sfc_log.txt"

Then open the sfc_log.txt file from your desktop.

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