In tweaking all in one repair, tab4, its a good idea to add a checkbox to review the SFC report by doing;
findstr /c:"[SR]" %windir%\logs\cbs\cbs.log >sfcdetails.txt
supposedly, it reports what it can not fix.
I also read this; seems logical to skip SFC and use DSIM instead or both;
this command works in win7;
Dism /Online /Cleanup-Image /ScanHealth