Reference: System File Checker In attempting to run this command from the Adminstrator: Command Prompt, the command starts and then stops at 8% complete, then breaks out saying... Windows Resource Protection could not perform the requested operation. HELP!! Please.... How do I fix this "sfc" function? Is it the command or is it the data it's scanning? I've never tried this command before. If Vista does't support the command, how did it start in the first place?