I am have problems with the Unreal Tournament 3 demo and Stalker Shadow of Chenolby Here is my system if it helps intel core 2 duo 2.o ghz geforce 8600 256(upto 512 shared) windows XP UT3 starts and then I get a black screen and I get a message saying that Ut3 had a problem and needs to close any Ideas Stalker SoC Im running it on 800x600 res on on low and I still get a really low frame rate and then the computer crashes and I get a blue screen saying something about a fatal error and physical memory dump any Ideas on how to fix?