SFC and DISM

Always run dism before sfc.

dism /online /cleanup-image /restorehealth

Then sfc

sfc /scannow

But then you need to check the sfc logs and might have to run it again.  It is kind of like Windows Update in that way.

Check the logs:

cd\

findstr /c:"[SR]" %windir%\logs\cbs\cbs.log >sfclog.txt