I have a Advent 8117 laptop which will not load the o/s. It shows the loading screen ,goes blank then does nothing else. Unable to get into Safe Mode loads but stops at Loaded: \Windows\system32\drivers\crcdisk.sys . Tried F8 and repair computer and 'Reinstall windows' and 'start full destructive recovery' but goes a little way then just stops and will not continue ( left for over 2 hrs !) The recovery is on on the hard drive as no Vista o/s disk supplied with machine. Any suggestions ?