I have Win XP and a Geforce 4 card, and have the problem too. I pick a scenario, it loads and starts, and RT3 ends. I tried everything. I bought the game in January, and had no problems in the beginning, but suddenly it started. I dont know if the Update to Patch 1.02 then 1.03 solved it or caused it to appear at first, but at some point it was working again, i dont know what i did, or what setting i changed in options, but it ran perfectly fine for a few months. Now i have the Problem AGAIN, without having changed anything. And reinstall did not help either :-( I would be happy if somebody could identify exactly what setting i ned to disable, or if it is the Nvidia driverversion that causes it