System File Checker is a utility in Windows 10 that checks for problems with files on your computer. … After you see a message that says “The operation completed successfully,” type sfc/scannow (note the space between “sfc” and “/”) and press Enter.

What does sfc Scannow actually do?

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%System32dllcache. … This means that you do not have any missing or corrupted system files.

Is sfc Scannow safe to run?

Windows Resource Protection did not find any integrity violations: there are no missing or corrupted system files, and no further action is needed. Windows Resource Protection could not perform the requested operation: this problem can be resolved by running SFC scan in safe mode (see last step).