i think its 64 bit.
i put the ddl, or dll file that was needed for FMS to work on vista. that made the program open, but it only works with the textures turned off. which looks lame. the sky is just blue, no detail and its hard to tell where i am.

i really dont care for windows 7. i miss my older computer with window 2000. i also cant play STARTREK ARMADA on window 7