The SFC /scannow command is a command of System File Checker, a utility built into Windows operating systems.
System File Checker scans critical system files and verifies their versions. If this utility finds any files that have the wrong versions, it replaces them with the correct, verified ones.
To run this command, you need to open an elevated command prompt. To do this, type command prompt in the Windows search bar and right-click or press and hold Command Prompt (Desktop app) from the list of results.
Select Run as administrator, and then select Yes. In the Command Prompt window, type sfc /scannow (note the space between “sfc” and “/”) and press Enter.
The sfc /scannow command will scan all protected system files and replace corrupted files with a cached copy that is located in a compressed folder at %WinDir%\System32\dllcache.
What does SFC /scannow fix?
The SFC /scannow command is a command of System File Checker, a utility built into Windows operating systems.
It scans and verifies all the protected system files, including .dll and .sys files. It replaces corrupted or damaged files with a cached copy or a repair source.
This can be helpful in troubleshooting system issues caused by file corruption.
