
When an SFC scan fails, it displays an error message explaining what went wrong and why the scan failed. A successful SFC scan can fix a multitude of different issues with a Windows computer, but an SFC scan can also fail entirely.

An SFC scan analyzes all system files for corruption and damage and fixes any issues with system files found by replacing the damaged or corrupted system files with completely fresh, cached versions. An SFC (System File Checker) scan is a pretty useful utility built into every version of the Windows Operating System.
