Using Task Manager and going to 'New Task' and then 'Browse' I seem to be able to browse through my folders, including C drive. I managed to access System Restore (despite many boxes coming up telling me things like 'wininit.exe - unable to locate component' etc) but the ONLY restore point was for yesterday, when I still had this problem. All my other restore points have vanished.
Is there a way to access 'restory factory settings' this way? F11 is definitely supposed to be emergency recovery and should restore factory settings however nothing happens when I press F11 except that the computer re-boots.
Malawarebytes is the ONLY thing I've managed to open without any error boxs appearing, which seems odd. I'll run it but I can't post the results log obviously.