it might[I\] be your version of Direct X. FS2 came with built in support for DX6, and it works on my machine without a hitch on DX7.1. however, i installed DX8 (godawful) and nothing worked. the only thing that i ever got to work right after i 'updated' was Oni, and that's cause it used Open GL. if you have DX8, i don't know. the only way i fixed it was wrote zeros the the hard drive, partioned it into three sectors, installed Win 98 on two of them, one with DX7, one with DX8, and the third with Win 2000. surprisingly, the latter is the one that crashes less frequently. if at all. hope this is of some help.