Feb 11, 2018

Fix corrupted or missing Windows 10 system files

Boot your computer in safe mode and run the System File Checker tool and the Deployment Image Servicing and Management tool. The System File Checker tool and the Deployment Image Servicing and Management tool check if there are corrupted system files on your computer. Open the command prompt and run the following commands.

System File Checker tool
sfc /scannow

Deployment Image Servicing and Management tool
DISM /Online /Cleanup-Image /RestoreHealth

https://answers.microsoft.com/en-us/windows/forum/windows_10-update/system-file-check-sfc-scan-and-repair-system-files/bc609315-da1f-4775-812c-695b60477a93