Thanks Gerry.
New problem, when I go to click start (it is already set to automatic) I get the following error:
'Windows could not start the Windows Event Log service on Local Computer.
Error 4201: The instance name passed was not recognized as valid by a WMI data provider.'
FYI. I have left the Driver Verifier running and it is causing the computer to restart without prompting irregularly. No pattern as to what is causing it.
UPDATE: After leaving for the screen to timeout again (when the screen goes to standby (after 10mins)), I opened it again. Opened task manage to look for anything unusual then opened IE. Screen went blank and had to physically press the reset button on the computer to get it back. All very odd... I clearly have something wrong with a driver but god only knows which one(s).