The Windows File Checker is used to scans all the protected system files and replaces incorrect versions with a cached copy of the correct version. These are the command-line options to control the Windows file protection (WFP) utility.

The System File Checker is initiated with using the "SFC" command. Below are the command-line option which can be used with this utility.

/SCANNOW     Scans all protected system files immediately.
/SCANONCE    Scans all protected system files once at the next boot.
/SCANBOOT    Scans all protected system files at every boot.
/CANCEL      Cancels all pending scans of protected system files.
/QUIET       Replaces all incorrect file versions without prompting
             the user.
/ENABLE      Enables Windows File Protection for normal operation
/PURGECACHE  Purges the file cache and scans all protected system
             files immediately.
/CACHESIZE=x Sets the file cache size

Related Tweaks

• Change the Size of the Windows File Protection Cache (Windows 2000/XP)
• Disable Windows File Protection (Windows 2000/XP)
• Manage Windows File Protection Scans (Windows 2000/XP)
• Specify the Directory to Store Cached SFC Files (Windows 2000/XP)
• Display SFC Progress Meter (Windows 2000/XP)

Disclaimer: Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.