Hi Just purchased fallout new vegas on dvd tried to install it all looked ok. steam did a big update watched the opening video and then my computer locked up. Restarted computer then started steam and tried to start the game and nothing happened. I am running windows 7 64 bit on 2.5 ghz intel quad core with an ATI radeon HD 4350 Card. Any ideas on how to get the game working?

You'll need either a graphics upgrade to something more powerful, or it that's a laptop, than an entirely new one of those with a games-capable graphics system in it.