How to Repair Corrupted Files in Windows 11 Using DISM and SFC

 

Learn how to repair corrupted files in Windows 11 using the DISM and SFC tools. A step-by-step guide to fixing system errors without reinstalling Windows.

How to Repair Corrupted Files in Windows 11 Using DISM and SFC

Is your computer experiencing strange errors? Do applications stop responding, does Windows Update fail, or do messages appear indicating missing system files?

These symptoms often indicate that some essential Windows files are damaged or incomplete.

The good news is that Windows 11 includes two official tools capable of detecting and repairing these issues without needing to reinstall the operating system: DISM and System File Checker (SFC). Microsoft recommends running DISM first and then SFC for the best results when repairing the system image and protected files.

In this guide, you will learn when to use each tool, the difference between them, and how to safely resolve common errors.

Table of Contents

What are DISM and SFC?

When should you use them?

Differences between DISM and SFC

How to run DISM correctly

How to run SFC

What to do if SFC cannot repair the files

Tips to prevent this from happening again

Frequently Asked Questions

What are DISM and SFC?

Although they are often mentioned together, they serve different functions.

DISM

Deployment Image Servicing and Management (DISM) is a Microsoft tool that repairs the Windows image—that is, the set of files the system uses as a reference to restore damaged components. If that image is corrupted, SFC may not be able to complete the repair.

SFC

System File Checker (SFC) scans all protected system files and replaces any that are damaged with a correct copy stored by Windows.

When should you use these tools?

It is recommended to run them if you notice any of these symptoms:

*Windows Update fails constantly.

*The computer freezes for no apparent reason.

*Some Windows applications do not open. 

*Messages regarding corrupted files appear.

*File Explorer closes unexpectedly.

*The system displays errors after an improper shutdown.

💡 TechDano Tip: If you run SFC first and the Windows image is corrupted, some errors might not be fixable. That is why Microsoft recommends starting with DISM.

Step 1: Run DISM

1-Click Start.

2-Type cmd.

3-Right-click Command Prompt.

4-Select Run as administrator.

Type the following command:

DISM /Online /Cleanup-Image /RestoreHealth

Press Enter.

The scan may take between 10 and 30 minutes, depending on the computer's condition and internet connection speed, as DISM can retrieve files from Windows Update if necessary.

What do the results mean?

If you see the message:

The restore operation completed successfully

The Windows image has been successfully repaired.

Now proceed to SFC.

Step 2: Run SFC

In the same window, type:

sfc /scannow

Press Enter.

Do not close the window until progress reaches 100%.

Interpreting SFC results

✅ No integrity violations were found

System files are in good condition.

✅ Corrupted files were found and repaired

Restart the computer and check if the problem is resolved.

⚠️ Corrupted files were found but could not be repaired

You may need to check the CBS.log file or use a Windows repair source to complete the process.

Common errors when running DISM

Error 87

Usually caused by an incorrectly typed command. Check the spacing and syntax.

Error 50

Indicates that the command is not running on a valid Windows installation.

Error 0x800f081f

Generally means DISM cannot find the files needed to repair the image. In these cases, you may need to use an ISO image of the same Windows version as the repair source. 

Best practices

Keep Windows up to date.

Avoid turning off the computer during an update.

Do not use programs that promise to "clean" the registry without a clear reason.

Back up your important files.

Frequently Asked Questions

Does DISM delete my files?

No. It only repairs the operating system image.

Can I use SFC without running DISM?

Yes, but if the Windows image is corrupted, SFC might not repair all the files. That is why the DISM → SFC order is recommended.

How long does the process take?

Usually between 15 and 45 minutes, depending on the computer's performance.

Conclusion

DISM and SFC are two of the most useful tools included in Windows 11 for resolving issues related to system files. When used in the correct order, they can resolve stability errors, Windows Update failures, and unexpected behaviors without needing to reinstall the operating system.