anglo
LE

I think we are at cross purpose here, I think it's his browser he is having trouble withHoly fackin jeezus.
You have to set a Restore Point to restore to. Then at a later date W10 will restore to this. You can't restore from nothing.
If you want to just check all they system files are present and correct:
Then switch PC off. Put in box. Return to sender.
- In the search box on the taskbar, type cmd. Right click and select "run as administrator"*. Hit yes
- type in DISM.exe /Online /Cleanup-image /Restorehealth and press enter
- when its done type exit.
- sfc/scannow and press Enter
- when its done type exit.
Edit * make sure your user account is set to administrator. (I'm trying to get the answers in before the questions now!).
He appears to have a browser page on screen which indicates his computer is working