Hello,
I'm afraid this is the wrong forum for Windows 8 issues.
the best place for it would be at the Windows 8 forum:
http://social.technet.microsoft.com/Forums/en/category/w8itpro
As far as the problem goes: Try boot it in VGA Safemode see if that helps.
If it boots in there.. make sure you load your Graphics card driver :-)
Regards,
Marco
Key4ce - IT professionals: www.key4ce.eu