SFC was introduced with Windows Vista and is a utility to allow users to scan for corruptions in Windows system files and restore corrupted.
It needs to be run from an elevated command prompt.

SFC

Scans the integrity of all protected system files and replaces incorrect versions with correct Microsoft versions.

SFC [/SCANNOW] [/VERIFYONLY] [/SCANFILE=<file>] [/VERIFYFILE=<file>]
[/OFFWINDIR=<offline windows directory> /OFFBOOTDIR=<offline boot directory>]

/SCANNOW	Scans integrity of all protected system files and repairs files with problems when possible.
/VERIFYONLY	Scans integrity of all protected system files. No repair operation is performed.
/SCANFILE	Scans integrity of the referenced file, repairs file if problems are identified. Specify full path <file>
/VERIFYFILE	Verifies the integrity of the file with full path <file>. No repair operation is performed.
/OFFBOOTDIR	For offline repair specify the location of the offline boot directory
/OFFWINDIR	For offline repair specify the location of the offline windows directory

Examples

sfc /SCANNOW
sfc /VERIFYFILE=c:\windows\system32\kernel32.dll
sfc /SCANFILE=d:\windows\system32\kernel32.dll /OFFBOOTDIR=d:\ /OFFWINDIR=d:\windows
sfc /VERIFYONLY

Associated Commands

More Information

Microsoft KB: Use the System File Checker tool to repair missing or corrupted system files

 

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