I don't play any games and not sure if using the registry restore would get you back.
Did you leave repairs 27 unchecked as I believe MS had changed things where those repairs weren't working as they should, so Shane left them default unchecked.
Boot into Safe Mode with Networking and open Windows Repair - click on Backup Tools then click on Restore under Registry Backup.
Click on Registry Restore then use the dropdown to select the auto back up then click on Restore Now.