When I try to install the PC version the installation gets to a point and will not continue. I have tried the normal defrag and turning off all programs (including antivirus) and non essential services and it still stops mid install. The install screen cannot be closed and must be shutdown from taskmanager. I have all the latest drivers. I run Crysis and all my other games "OK". I'm running Vista Home Premium 4g RAM and a 8800GTX video card (Not in SLI mode). Any thoughts.

did you try waiting as when i installed it got to a certain point and started installing other stuff but at some points it seemed to have stopped but then kept going.

also your graphics card and ram wont affect installing any problems with installing are normaly either down to your disc drive or hard drive.