sfc /scannow – Guide for Windows XP, Vista, 7, 8, 8.1, 10
Sfc or sfc.exe stands for System File Checker. It’s a utility in Microsoft Windows operating systems, starting from Windows 98, that allows you to scan and restore corruptions in system files.
The sfc utility is available for Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1 and Windows 10.
To run this utility you need to be logged in as an Administrator.