Introduction - If you have any usage issues, please Google them yourself
in cmmand prompt
If you can get back to the cmd prompt:
SFC /scannow
Hit Enter
and after that runs
chkdsk /f /r
Hit Enter
If you have no changes and nothing got fixed by those
then its time for a reinstall.
from the Command Prompt :
C:\Windows\System32\rstrui.exe
After these, reboot
If you have no changes and nothing got fixed by those
then its time for a reinstall.