Major GFX Glitches

[Mutilated Messiah]

Hello everyone, i was wondering if someone could advise me,

I Recently got Penumbra and well graphicly its glitching like mad

Main Menu


In Game


I Dont Belive its my Graphics card drivers as i always use the latest ones (I Check Weekly for updates) and my Windows XP is 100% up to date. The game runs and i can move ect like normal but the graphics themselfs are very messed up, it was guess work on finding "New Game" on the main menu.

My hardware is:

Pentium 4 3.6Ghz Hyper Threading
2048Mb Ram
nVidia 7600GS (Clocked to GT Speeds)
200Gb Samsung SATA Hard Drive
AC97 On Board Audio
Windows XP Pro SP2

Thanks In Advance