How to use the SFC command utility to fix system files on Windows 10?


Even though Windows 10 does a good job protecting files that are necessary for your PC to work correctly, applications, drivers, or even Windows Update may sometimes be the cause of system instability. Like in previous versions, for these situations, Windows 10 includes the System File Checker (SFC), a tiny but powerful command-line utility that can scan the integrity and replace any corrupted or missing protected system file with a known good version.
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In this guide, we'll walk you through the steps to use System File Checker (SFC) to repair any damaged system file automatically while you're running the operating system, offline using Advanced start-ups, and manually when SFC is unable to fix the problem. 

Note: Before you begin, it's important to note that you'll be making changes to your system, as such it's recommended to do a full back up or create a system restore point in case things go wrong, and you need to roll back.

A. How to scan and repair system files on Windows 10

The following command will do a full scan of the protected system files on your computer and fix any file that are causing issues while Windows 10 is up and running.

  • Use the Windows key + X keyboard shortcut to open the Power User menu and select Command Prompt (Admin), as you will need administrator permissions to run SFC.
  • In the Command Prompt type, the following command and press Enter:
findstr /c:"[SR]" %windir%\Logs\CBS\CBS.log >"%userprofile%\Desktop\sfclogs.txt"
Once the scan completes, you will see one of the following messages:
  • Windows Resource Protection did not find any integrity violations: This indicates that your system doesn't have any missing or corrupted files.
  • Windows Resource Protection could not perform the requested operation: This message means that there was a problem during the scan and an offline scan is required.
  • Windows Resource Protection found corrupt files and successfully repaired them. Details are included in the CBS. Log %WinDir%\Logs\CBS\CBS.log: You will get this message when SFC was able to fix the problem. Now, you can move on or you can view the logs to get more details.
  • Windows Resource Protection found corrupt files but was unable to fix some of them. Details are included in the CBS. Log %WinDir%\Logs\CBS\CBS.log: In this case, you'll need to repair the corrupted files manually.
 Image result for scan and repair system

B. How to view the details of an SFC scan

To see the details of a System File Checker stored in the CBS. Log file, you'll need to make a readable copy on your desktop:

  • Use the Windows key + X keyboard shortcut to open the Power User menu and select Command Prompt.
  • Type the following command and press Enter:
  • Open the sfclogs.txt located on the desktop with Notepad. The file will contain all the details of the scanned system files and information for files that couldn't be repaired.
    Image result for CBS windows

C. How to scan and repair system files on Windows 10 offline

Sometimes protected system files that need to be repaired are loaded in memory while Windows 10 is running. If this is the case, you can run SFC offline to fix your computer.
  • Use the Windows key + I keyboard shortcut to open the Settings app.
  • Click Update & security.
  • Click Recovery.
  • Under Advanced start-up, click Restart now.
  • Click Troubleshoot.
  • Click Advanced options.
  • Click Command Prompt to boot your computer only with Command Prompt.
  • On reboot, you'll be prompted to enter your username and password to continue.
  • Whenever you need to run SCF outside of Windows, you need to tell the utility exactly where the Windows installation files are. On Command Prompt, type the following command to understand the location of the Windows and System Reserved partitions.
  • Type the following command, and press Enter:
sfc /scan now /offbootdir=C:\ /offwindir=D:\Windows
  • Once the scan is complete, close Command Prompt.
  • Click Continue to exit and go back to Windows 10.Related image

 Microsoft Windows is an operating system for computers which is made by Microsoft. More than 90% of desktops and laptops use Windows OS. Windows makes it easier to do things because of its stunning graphical user interface.For all types of Windows Technical Support services.You can give it a try or contact us at toll free number: +61 (2) 8074 7873. Contact us your queries at http://microsofthelpaustralia.com/microsoft-windows-support
Location: Australia

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