OK I got the game today and started it up. I skipped the prologue thing and started playing the game on the mining colony. However, while in the security room I was watching the video of a man speaking and the screen went black and the sound kept on stuttering and repeating a little clip. I had to turn off the power of my comptuer to get it to restart again. I went and installed it at a friends house and it worked perfectly there. I have an ATI 9600 XT graphics card with 256mb of memory and the rest of my computer is up to date. Please help someone.

i re-installed the game and the drivers for the computer and now when i try to load saved games the screen goes black and my system completely crashes

What driver are you using for your video card?