Hi Ghritak
1
Check Disk:
Press the Shift Key and click Restart
Your PC will boot into the Windows Recovery Environment
Go to Troubleshoot - Advanced Options - Command Prompt
Run this command and hit Enter:
chkdsk C: /f
When that command completes, run this command and hit Enter:
chkdsk C: /r
That command will take time to complete, when it does, restart back into Windows 10 normally
2
System Check
Click your Start Button, then just type cmd
From the resulting list, right click Command Prompt and choose 'Run as Administrator'
Run this command sand hit Enter:
sfc /scannow
When that command completes, run this command and hit Enter:
dism /online /cleanup-image /restorehealth
Wait for that command to complete (will take a while) and close Command Prompt
If you get any errors from any of those commands, please provide the exact error you see . . .