I get the same problem. It didn't happen with my old (v66 or so) nVidia drivers, but it happens with the newer ones (including the ones released yesterday). I upgraded because the game totally freezes the machine after 10-20 minutes of play at present. Now my mouse freezes THEN the computer crashes. Thanks for the workaround on the mouse - I was about to roll back the drivers figuring at least the mouse would be there until it crashed. I have a GeForce4 4400. I have 1GB of RAM, a large swap file, and I turn off all other apps (including virus protection) when I attempt to play... I've also tried turning off sound and dropping graphics detail level to low... so far so bad.