How to repair missing or corrupted system files windows 10
While working, playing a video game or doing watching a favorite movie system suddenly crashes With a Blue Screen Error. Your PC ran into a problem and needs to restart” error message? Windows 10 running slow, not responding or laptop freezes after windows 10 2004 upgrade? All these are symptoms of Windows System file corruption, may system files become corrupt, gone missing, or even have been changed by a software installation. And running build-in system file checker utility helps to repair missing or corrupted system files windows 10, 8.1 and 7.
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How to repair corrupted files windows 10
There are several reasons, such as third-party software install / Uninstallation, System files missing damaged while windows 10 upgrade, Virus or malware infection etc that results from windows system file corruption. In Windows 10, there are several built-in commands you can use to repair corrupt system files that tend to cause issues over time as you change Windows system files
System file checker Utility, Sfc /scannow is a command-line utility that allows users to scan for missing and corrupted system files and repair them.
DISM commands are less common. However, if the SFC command fails to run properly or can’t replace a corrupted file with the correct one, the DISM command can fix the underlying Windows system to assist the SFC to run correctly.
How to run system file checker windows 10
The System File Checker or sfc.exe utility in Microsoft Windows located in C: Windows\System32 folder allows users to scan for and restore corrupt Windows system files. In other words, The System File Checker tool scans your computer for any corruption. Or changes to system files that would otherwise interfere with the normal operation of your PC. From there, it replaces the file with the correct version to ensure smooth functioning. If you notice an increase in the Blue Screen of Death, applications constantly crashing, Windows operations stalling, you may need to run the System File Checker to help correct errors causing your PC to perform slowly.
Type cmd on start menu search,
Right click on the command prompt select run as administrator.
Now type command sfc /scannow and press enter key to execute the same.
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
Here The %WinDir% placeholder represents the Windows operating system folder. For example, C:\Windows.
Wait until 100% complete the scanning process.
Restart windows to take effect the changes.
Note: If system file checker utility scan results “Windows Resource Protection could not perform the requested operation” To resolve this problem, perform the System File Checker scan in safe mode, and make sure that the PendingDeletes and PendingRenames folders exist under %WinDir%\WinSxS\Temp.
If sfc scan results, 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. Then run DISM command following steps below.
Run DISM command windows 10
Microsoft Windows Deployment Image Servicing and Management (DISM) is a software tool that information technology (IT) administrators used through the command line or PowerShell to repair and prepare Windows images, including the Windows Recovery Environment, Windows Setup, and Windows PE.
Whenever the System file checker fails to restore missing system files its recommended to Run DISM command utility that repairs the broken system image allow SFC utility to do its job. To do this
Again open the command prompt as administrator
Type Command DISM /Online /Cleanup-Image /RestoreHealth and hit Enter.
This will try to use Windows Update to replace the damaged files. This process takes a long time to complete. If the problem has also extended to the Windows Update components, then you’ll need to specify a source containing the known good files to repair the image.
DISM restore health with Source options
If the DISM command-line unable to replace the damaged files from the windows update, you need manually specify the source files. To do this
Insert the Same version of Windows 10 Installation media, If you don’t have download windows 10 ISO Right-click on it, select mount and make sure to note down the new drive letter. (For example D)
Now again Again Open the command prompt as administrator, type command below and hit enter:
DISM /Online /Cleanup-Image /RestoreHealth /Source:ISOmountpath\install.wim
Note: Replace ISOmountpath with your Drive letter which you mount the ISO file. For Ex my ISOmountpath Drive letter is D:
Try System Restore or a System Reset
If you’re still experiencing issues. Running the System Restore tool will restore your Windows operating system files to an earlier state, and this may fix system corruption problems if the operating system wasn’t damaged at that earlier point.
Alternatively, there’s always just performing a system reset or reinstalling Windows, too. On Windows 10 you can perform a “Reset this PC” operation to reset Windows to its default state. You’ll have to reinstall your programs after, but you won’t lose any personal files.
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