Windows system file checker (SFC) a useful utility automatically detect and restore missing system files with correct one. Whenever you notice Windows not performing well, freezes or through different error at startup, or especially after recent windows 10 upgrade we recommend to run the SFC utility sfc /scannow command to fix corrupt missing system files. But for few users system file checker unable to repair corrupt files. The 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.
Well if you are also struggling with similar problem, try solutions below to fix corrupted system files on Windows 10, 8.1 and 7.
About System File Checker Utility
System File Checker also knows as sfc Utility helps to scan and Restore Missing, Corrupted System files. In Windows 10 operating system, System File Check (sfc.exe) is integrated with Windows Resource Protection, which protects registry keys and folders as well as critical system files. When you run The Sfc / Scannow Command The Utility scan all protected system files, if it finds a problem, it will attempt to replace the problematic files with a cached copy that is located in a compressed folder at %WinDir%\System32\dllcache.
SFC scannow unable to fix windows 10
As We all know the corrupted system files should be fixed in order to maintain the integrity of the system but as SFC failed to do it job, you are not left with many other options. Don’t worry if SFC fails here we have other better alternative to fix corrupted files then System File Checker.
But before start, we recommend to check and install the latest windows updates first. That probably help with the bug fix that causing sfc to do its job.
- Open Settings app,
- Search for windows update and select check for updates,
- Lets windows update to download and install updates (if available there)
- Restart windows to apply the updates,
- Now run the sfc utility, probably this may help
Boot into Safe Mode then try SFC
Windows Safe Mode boot Start System with minimal System Resources, disable Unnecessary Add-ons And allow to perform Troubleshooting steps. Run System file checker utility on the safe mode that probably helps if any third party addon prevents sfc utility to do its job.
- Press Windows + R, type msconfig and click ok
- This will open system configuration window,
- Move to Boot Tab and Checkmark on safe Boot option.
- Click Apply and ok,
- Then Restart windows this will Start windows into safe mode Automatically.
Now open the command prompt as administrator and type SFC /SCANNOW and hit the enter key.
Note: Just make sure the PendingDeletes and PendingRenames folders exist under C:\WINDOWS\WinSxS\Temp. To go to this directory open Run and type %WinDir%\WinSxS\Temp. This may help if some start-up programs are creating a problem.
Run DISM Tool
On Safe mode also System File Checker Fails to fix Corrupted System files, Then We need to Run The DISM Tool Which Cleanup repair the Windows image and Enable SFC utility to do its job.
To Run DISM Tool you need to open the command prompt as administrator. You Can do this by click on Start menu search Type cmd and press CTRL + Shift + Enter.
Now Type the following and press enter To execute the command
DISM /Online /Cleanup-Image /RestoreHealth
This will start the Scan and RestoreHealth process, This command checks for component store corruption, records the corruption and FIXES the corruption. Let the DISM command run and wait until 100 % Complete to finish.
If the above command doesn’t work then try To Run DISM With Source File.
For This You Need A Source image ( Windows Installation media ), Right Click and mount the same and note down the drive letter. If you don’t Have installation media Create one by following this.
Now Type following Command and hit enter key to execute the same.
DISM /Online /Cleanup-Image /RestoreHealth /Source:ISOmountpath\install.wim /LimitAccess
Note: Replace ISOmountpath with your Drive letter which you mount the ISO file. For Ex my ISOmountpath Drive letter is D:
After Complete 100% the Scanning process Again Run Sfc / scannow command This Time system file checker Scan and Restore system files successfully. For most users DISM Tool seems to Fix Windows Resource Protection found corrupt files but was unable to fix some of them issue in most of the cases but if you are still stuck then try the next method.
Run SFCFix Tool
Also Running the SFCFix Tool will scan your windows for corrupted system files and will restore/repair these files which System File Checker failed to do so.
First Download SFCFix Tool from here. Then open command prompt As an administrator and type SFC /SCANNOW to run the system file checker utility. while running the process launch the SFCFix.exe.
Once SFCFix has run its course it will open a notepad file with information about all the corrupt/missing system file that SFCFix found and whether or not it was successfully repaired. In a perfect world, it will tell you what file was corrupted and that it was fixed. If you don’t see the words FIXED/REPAIRED then it did not fix the problem.
Try Startup Repair
With Windows 10 and 8.1, Microsoft Added an Advanced option where you can run Startup Repair which Scan and repair corrupted damaged system files which cause issue while windows startup. If after performing Above methods still SFC Results Windows Resource Protection found corrupt files but was unable to fix some of them, running the Automatic Repair at startup is very helpful to fix this.
To perform Automatic Repair / Startup repair first you need to access Advanced Options. Then click on Automatic Repair as shown bellow image.
This will Restart windows, Check and Start the repair Process for fallowing
- Missing/corrupt/incompatible drivers
- Missing/corrupt system files
- Missing/corrupt boot configuration settings
- Corrupt registry settings
- Corrupt disk metadata (master boot record, partition table, or boot sector)
- Problematic update installation
After that, you can restart and Run the SFC utility, Hope this time you didn’t find any error.
Check cbs.log manually
Also, You can Check The cbs.log file manually to check which files are corrupted and you may replace them with a good copy. To open the CBS.Log File Press Windows + R then type C:\windows\logs\CBS and hit Enter. Then double click on CBS.log file.
If you get access denied error then, Right-click on the CBS.log file and select properties. Switch to Security tab and click Advanced. Click on Change under Owner. Type Everyone then click on Check Names and click OK. Now click Apply followed by OK to save changes. Again right-click CBS.log file and select properties, Switch to Security tab then select Everyone under Group or user names and then click Edit. Make sure to check mark Full Control then click Apply followed by OK.
Now try to access the file and this time you will be successful. Then Press Ctrl + F then type Corrupt and it will find everything that says corrupt.
Now you will find what actually is corrupted which can’t be fixed by SFC. Type the query in Google to find out how to fix the thing which is corrupted, sometimes it is as simple as re-registring a .dll file.
These Are some best applicable solutions to apply when SFC utility Unable to fix corrupted system files on Windows computers. I hope After apply above solutions Windows Resource Protection found corrupt files but was unable to fix some of them will get solved. have any difficulty while applying these solutions feel free to discuss on the comments below.