Some Times Windows users may notice System not running smoothly, unnecessary errors appear, system getting Freezes continuously. Even Installed components are not working properly or Windows having trouble during startup. These all are possible that Windows system files have become corrupt, gone missing, or even have been changed by a software installation somewhere along the line. Windows includes a SFC command utility sfc / scannow ( system file checker ) that will scan, verify, and fix system files by Restore from a cache copy located on %WinDir% \system32\dllcache folder.
What is system file checker Utility
SFC which stands for System File Checker, scans all protected system files for corruption. And it attempts to repair it by copying a cached copy of each corrupted file from the %WinDir% \system32\dllcache folder. This utility was first available in Windows 98 and subsequent versions of Windows XP, Windows Vista, Windows 7, 8.1 and Windows 10 has this feature. In Windows 10 the System File Checker is integrated with Windows Resource Protection. Which protects registry keys and folders as well as critical system files. If any changes are detected to a protected system file, the modified file is restored from a cached copy located in the Windows folder itself.
If your are also suffering with buggy performance of your windows, Don’t worry Here fallow bellow instructions to Run the System file checker Tool on windows.
How To Run system file checker Utility On Windows 10
You can Run This tool on Normal windows, if windows not running smoothly then you can start windows into safe mode or windows unable to start you can Access Advanced startup options to and Run the SFC Utility .
To run this utility in Windows, you will need to open the Command Prompt in administrator mode. On start menu search Type CMD select command prompt from search results. Right-click on it and select Run As administrator. or you can press Windows+X on your keyboard, and choose “Command Prompt (Admin)” from the Administrative Tools menu.
Now When the command prompt appears Here type bellow command and press Enter :
sfc / scannow
You see text: Beginning system scan. This process takes some time.
The sfc /scannow command will scan all protected system files, and replace corrupted files with a cached copy that is located in a compressed folder at %WinDir% \System32\dllcache. The %WinDir% placeholder represents the Windows operating system folder. For example, C:\Windows.
Note During the scanning process If you’re prompted to insert the Windows disc, do so. Corrupt files must be replaced by fresh ones.
Fix error Windows Resource Protection Could Not Start the Repair Service
In case you are unable to start the System File Checker and you instead get the “Windows Resource Protection Could Not Start the Repair Service” error, you may want to check up if your Windows Modules Installer service has been Disabled. To do so, type services.msc in start search and hit Enter. The status of this service should be set to Manual.
system file checker Scan Results
Wait until the scanning process to complete, 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.
If you get message 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.
Quick Tip: You may want to run the command around three times to fix all the problems.
After complete the process simply Restart the windows to take effect the changes system file checker have do.
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:
1. Right click on Start menu from power menu select Command prompt ( admin) this will open the command prompt as administrator. Now Type the fallowing command and press enter key.
findstr /c:”[SR]” %windir%\Logs\CBS\CBS.log >”%userprofile%\Desktop\sfclogs.txt”
This will create a sfclogs text document on Desktop. Now 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.
Hope you Find this This Article How To Repair Corrupted Windows System Files with the SFC Utility helpful. Also Read From Our blog How To Fix Memory problems using Memory Diagnostic Tool. Also Subscribe our news Letter to get latest update posts to your mail box.