Conface

Hello, I have a very annoying problem. I just shelled out a bunch of money for a new computer that could run all the games I have at top speed and also run up and coming games very well. But the problem is I can't get them to work!! I don't know if it is because of Vista, or if it is because of my hardware but (for example) I go to play Supreme commander and it just crashes a minuite into the game. I have tried running the games in administrator mode, but that doesn't work either. I have the FX-62 processor, 2 GB of RAM and a 8800 GTX video card, so I really don't understand why I my games are not running. I have updated as many drivers as I possibly can, and all with vista 64 upgrades. If anyone has any hints that could get me up and gaming they would be much appreciated!