How do I run the System File Checker (SFC)?

How do I run the System File Checker (SFC)?

To run the System File Checker (SFC), you will need to use the Command Prompt with administrative privileges. Here are the steps to follow:

1. Open Command Prompt as Administrator:

   • Click on the Start button and type "cmd" in the search bar.
   • Right-click on "Command Prompt" from the search results and select "Run as administrator."

2. Run the SFC command:

   • In the Command Prompt window, type the following command and press Enter:

     <code>sfc /scannow</code>

   • The System File Checker will now start scanning all protected system files and replace corrupted files with a cached copy.

3. Wait for the process to complete:

   • The scanning process can take some time, so it's important to let it run until it finishes. You will see a message indicating the progress of the scan.

4. Review the results:

   • Once the scan is complete, you will see a message indicating whether the integrity of the system files was successfully verified or if any issues were found. If issues were found, they will be repaired if possible.

What should I do if the System File Checker finds corrupted files?

If the System File Checker finds corrupted files, it will attempt to repair them automatically. Here’s what you should do next:

1. Check the Results:

   • After the scan, if the SFC tool reports that it found integrity violations but could not fix some of them, you need to take further action.

2. Run SFC in Safe Mode:

   • Restart your computer in Safe Mode and run the SFC scan again. To enter Safe Mode, restart your computer and press F8 before the Windows logo appears, then select Safe Mode from the Advanced Boot Options.

3. Use the DISM tool:

   • If SFC cannot repair the files, you can use the Deployment Imaging Service and Management Tool (DISM). Open Command Prompt as an administrator and run the following commands sequentially:

     <code>DISM /Online /Cleanup-Image /RestoreHealth</code>

     Wait for the process to complete, then run SFC again:

     <code>sfc /scannow</code>

4. Review Logs:

   • If the issues persist, you can review the CBS.log file located in %windir%\Logs\CBS\CBS.log for more details about the corrupted files. This can provide insight into what went wrong and help you identify the next steps.

5. Consider System Restore or Reinstallation:

   • If none of the above steps resolve the issue, consider using System Restore to revert your system to a previous state when it was working correctly, or as a last resort, reinstall Windows.

Can I run SFC on Windows 10 and Windows 11?

Yes, you can run the System File Checker on both Windows 10 and Windows 11. The steps to run SFC on both operating systems are essentially the same as described in the first section:

1. Open Command Prompt as Administrator:

   • Search for "cmd" in the Start menu, right-click on "Command Prompt," and select "Run as administrator."

2. Execute the SFC command:

   • Type <code>sfc /scannow</code> and press Enter.
3. Wait for the scan to complete and review the results.

The System File Checker utility is a built-in tool in Windows, designed to work across different versions, including Windows 10 and Windows 11, to help maintain system integrity.

How often should I run the System File Checker to maintain system integrity?

The frequency of running the System File Checker can vary based on your system's stability and usage. Here are some general guidelines:

1. Regular Maintenance:

   • It's a good practice to run SFC at least once every few months as part of your regular system maintenance routine. This helps ensure that system files remain intact and can prevent issues before they become problematic.

2. After Installing New Software or Updates:

   • Running SFC after installing new software or major Windows updates can help verify that the system files have not been affected or corrupted during the installation process.

3. When Experiencing System Issues:

   • If you start experiencing system crashes, error messages, or other issues, running SFC can help diagnose whether corrupted system files are the cause.

4. Post-Virus or Malware Removal:

   • After removing viruses or malware, it’s a good idea to run SFC to ensure that the system files were not compromised during the infection.

By following these guidelines, you can help maintain your system's integrity and performance over time.

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