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Scans and verifies the integrity of all protected system files and replaces incorrect versions with correct versions. If this command discovers that a protected file has been overwritten, it retrieves the correct version of the file from thesystemroot\ folder, and then replaces the incorrect file.
Important
You must be logged on as a member of the Administrators group to run this command.
sfc [/scannow] [/verifyonly] [/scanfile=<file>] [/verifyfile=<file>] [/offwindir=<offline windows directory> /offbootdir=<offline boot directory> /offlogfile=<log file path>]| Parameter | Description |
|---|---|
| /scannow | Scans the integrity of all protected system files and repairs files with problems when possible. |
| /verifyonly | Scans the integrity of all protected system files, without performing repairs. |
/scanfile<file> | Scans the integrity of the specified file (full path and filename) and attempts to repair any problems if they're detected. |
/verifyfile<file> | Verifies the integrity of the specified file (full path and filename), without performing repairs. |
/offwindir<offline windows directory> | Specifies the location of the offline windows directory, for offline repair. |
/offbootdir<offline boot directory> | Specifies the location of the offline boot directory for offline repair. |
/offlogfile=<log file path> | Specifies a location to store the log file other than the default. |
| /? | Displays help at the command prompt. |
To verify thekernel32.dll file, type:
sfc /verifyfile=c:\windows\system32\kernel32.dllTo set up the offline repair of thekernel32.dll file with an offline boot directory set toD: and an offline windows directory set toD:\Windows, type:
sfc /scanfile=D:\windows\system32\kernel32.dll /offbootdir=D:\ /offwindir=d:\windowsWas this page helpful?
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