SFC[/SCANNOW][/SCANONCE][/SCANBOOT][/CANCEL][/ENABLE][/purge CACHE][/CACHE
SIZE=x] [/QUIET]
/SCANNOW scans all protected system files immediately.
/SCANONCE scans all protected system files once.
/SCANBOOT scans all protected system files every time it is started.
/CANCEL Cancels scanning all suspended protected system files.
/QUIET replaces all incorrect file versions without prompting the user.
/ENABLE Enables Windows file protection for normal operation.
/PURGECACHE clears the file cache and scans all protected system files immediately.
/CACHESIZE=x sets the file cache size.