Forum:Fallout 3 Crashing at startup?!

I'm not sure if this is the right place to start this thread. But since I've gotten so much usefull help from this site I decided to do it anyways. I recently installed Fallout 3 and when I tried starting fallout after the installation was complete I got a "Fallout 3 Does not respond" error thingy. I searched online a bit a people told me to update drivers for sound/graphic card. I did and tried again, but no difference, still doesn't respond. Do you have any idea what it could be? Obviously there is something on this PC that is blocking it. I am running Windows XP Proffesional 32bit. Do you think it would help if I installed Windows 7 maybe? Thanks in advance.