Routine Windows 10 system File Checker
Click the search button - second from the left on the taskbar. type CMD then click Open or Admin. Click YES on the popup panel. A black command prompt screen shows.
Where the cursor mark is blinking - type sfc /scannow - press enter.
The file checker will then start.
On finishing, it will say that either all is OK or that some files have been repaired.
NOTE - See first comment by John H for more information, and more tools.