i too have problems with the game shutting off suddenly. it appears for me anyway, that the problem occurs most after either playing the game for a long time or after not having restarted my computer in a long time. i agree that restarting b4 playing might help, as it seems to for me. i started having my problem soon after i downloaded a great deal of GLR (light rail) BATs, but so far havent determined if one of them is corrupted.