You don't have permission to access it directly by default. that's normal. Don't worry about changing permissions or taking ownership.
Just open a command prompt. MAKE SURE IT IS RUNNING AS AN ADMINISTRATOR. Go to start >accessories and right click on command prompt and click on "run as administrator"
Copy and paste this line into command prompt:
findstr /i /c:"[SR]" "%windir%\Logs\CBS\CBS.log" | findstr /i /v /c:"verify" > "%userprofile%\Desktop\sfcdetails.txt"
This will put the information about the files sfc couldnt fix on your desktop into sfcdetails.txt