right click start button
choose powershell (admin)
type SFC /scannow and press enter
once its completed, copy/paste this command into same window:
Repair-WindowsImage -Online -RestoreHealth
and press enter
SFC fixes system files, second command cleans image files, re run SFC if it failed to fix all files and restart PC
you could run startup repair but it normally doesn't do anything (it will say it was unable to repair errors even if there aren't any)
Go to settings/update & security/recovery
under advanced startup, click restart now button
this restarts win 10 (lol. hopefully) in Windows recovery
choose troubleshoot
choose advanced
choose start up repair - this will scan PC and maybe fix this - will ask for logon info...