sfc [/scannow] [/verifyonly] [/scanfile=file] [/verifyfile=file] [/offbootdir=boot] [/offwindir=win] [/?]
Tip: See How To Read Command Syntax if you’re not sure how to interpret the sfc command syntax above.
/scannow = This option instructs sfc to scan all protected operating system files and repair as necessary.
/verifyonly = This sfc command option is the same as /scannow but without repairing.
/scanfile=file = This sfc option is the same as /scannow but the scan and repair is only for the specified file.
/offbootdir=boot = Used with /offwindir, this sfc option is used to define the boot directory (boot) when
Sfc /scannow will inspect all of the important Windows files on your computer, including Windows DLL files. If System File Checker finds an issue with any of these protected files, it will replace it.
Note: There’s a space between sfc and /scannow.