Syntax Microsoft Windows 2000 Syntax Microsoft(R) Windows 2000 Windows File Checker Version 5.00
(C) 1999 Microsoft Corp. All rights reserved Scans all protected system files and replaces incorrect versions with correct Microsoft versions. SFC [/SCANNOW] [/SCANONCE] [/SCANBOOT] [/CANCEL] [/ENABLE] [/PURGECACHE] [/CACHE SIZE=x] [/QUIET]
| /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 |
Microsoft Windows XP Syntax Microsoft(R) Windows XP Windows File Checker Version 5.1
(C) 1999-2000 Microsoft Corp. All rights reserved Scans all protected system files and replaces incorrect versions with correct Microsoft versions. SFC [/SCANNOW] [/SCANONCE] [/SCANBOOT] [/REVERT] [/PURGECACHE] [/CACHESIZE=x]
| /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. |
| /REVERT | Return scan to default setting. |
| /PURGECACHE | Purges the file cache. |
| /CACHESIZE=x | Sets the file cache size. |
Examples sfc /scannow Begins the scan of all system files. | 
