GM's might find this tricky even too!

Right, after savaging through posts to find a similar problem I haven't any luck. My problem is, that in them middle of a match my computer screen goes COMPLETELY BLACK. Power seems to be on, and CTR + ALT + Delete doesn't even react. My computer, which is fairly knew, windows vista 3 GB RAM which runs internet and applications with ease just crashes. I must hold the power button to turn off the laptop. Of course turning off the laptop that way isn't good for my laptop so I tend to avoid playing crossfire now. So I play on my other laptop, Packard Bell, Windows 7, 4 GB RAM, which is my main laptop which runs crossfire perfectly (UK server 15 ping average, but low 60 fps - Decent). It would be useful if I could play Crossfire on both. Now my description of my problem is stated clearly. Nothing much happens, just in a middle of a game, my screen goes black and no keys or combinations work. FROZEN. Help Saidin??

- Kevin