so i bought portal 2 and when i was about to play it the game crash right after you finish loading and getting into the main screen. can anyone tell me whats the problem is? if its a computer porblem maybe i could fix it. i have window vista. 4 gb of memory. 2.0ghz dual core. 1 gb of graph card. i have like 70 gb of free hard drive space. and i have everything that is Requirements on my labtop. i just dont get it! can anyone plz help me. thinks god and you guys.