Well, like what others are saying, it could be bad RAM. It also might be a bad video card as well. If you have more then one stick of ram (SDRAM, or DDR, or RDRAM that is, not the stuff that only runs in pairs like EDO RAM (you can tell the difference because the stuff that ran in pairs only had 72 pins, the new stuff has 162 or more if RDRAM)) try removing one of the RAM sticks and try to play the game again. If it fails again, try removing another RAM stick (if you have 3 or more), and then another, etc., untill you have just one RAM stick (and or it works). If it keeps on failing, test each RAM stick individually to see if it will not work with certain stick(s). If you can isolate it to a single RAM stick then you know that that stick is bad. Just go out and replace it (or if you don't feel like going through the hassle and considering how cheap RAM is, just go buy all new RAM and replace it all, but if you do that you might not know for sure that it was bad RAM 🙂 ).