By john 
You run sfc /scannow, wait for it to reach 100 percent, and get the message: “Windows Resource Protection found corrupt files but was unable to fix some of them.” When Windows 10 SFC unable to dewaasia fix corrupt files appears, the usual go-to repair tool has reached its limit.
System File Checker repairs Windows files by copying good versions from a local store of components. If that store is itself damaged, SFC has nothing reliable to copy from.
The fix is to repair the component store first with DISM, then run SFC again. If that does not work, an in-place repair replaces Windows files while keeping your programs and data.
The message is frustrating because it suggests damage without saying how serious it is or what to do next.
Why This Happens
SFC cannot complete repairs for these reasons:
- The component store, which SFC uses as its source, is damaged.
- A pending update or restart is holding files.
- Third-party software has replaced system files, which SFC cannot restore.
- Disk errors are affecting system files.
The log at C:\Windows\Logs\CBS\CBS.log lists the files SFC could not repair.
Start With These Basic Checks
Repair the source, then run SFC again.
- Restart the PC to clear pending operations.
- Open Command Prompt as administrator.
- Run DISM /Online /Cleanup-Image /RestoreHealth and wait for it to finish.
- Run sfc /scannow again.
- If SFC now reports that it repaired files, restart once more.
Running SFC two or three times after DISM sometimes completes repairs that the first pass could not.
Make sure you are using an administrator Command Prompt, since running SFC without administrator rights produces a different error.
Going a Step Further
Use other repair methods.
- Run chkdsk C: /f and restart to fix disk errors.
- If DISM fails, mount a Windows 10 ISO and use DISM with /Source pointing to its install.wim or install.esd.
- Start the PC in Safe Mode and run sfc /scannow there.
- Search CBS.log for “Cannot repair member file” to see which files are affected.
- Use the Media Creation Tool’s “Upgrade this PC now” option to perform an in-place repair while keeping files and apps.
If only a few non-essential files are listed and Windows works normally, the warning may be harmless.
A Word of Caution
Back up personal files before an in-place repair. Do not copy system files from other PCs or websites to replace damaged ones.
Final Thoughts
When SFC cannot fix files, repair the component store with DISM and run SFC again. If needed, perform an in-place repair to restore Windows.
After a successful repair, create a restore point so you have a clean state to return to if problems reappear.