I have Windows Vista Ultimate x64 on my MacBook Pro and I installed all drivers and latest drivers from apple and nvidia and Guild Wars and thats it. I got to play and it's all fine until 30 min of play and it starts doing doing freezes/ pauses for 3-5 seconds, every couple of minutes. Then my FPS drops from capped 60 to capped 30 and it startes freezing even worse. I installed windows xp and I still had the same problem. Im thinking its a driver problem and maby it something I can disable. Please help me.