well.. That's... weird.. cause I'm pretty sure I use 64bit version....
But at least some form of it works.
I'd make a copy of settings that work, and try either a) reset graphics (in game defaults) and then adjust them anew (might crash game though)
or B) Changing each setting up and down a little bit, maybe adjust resolution, etc. see if anything changes. (Less likely to crash, but still might, which is why I recommend copying "working settings" so that if it crashes or stops working, you can just delete the attempt and put the copy back in.
Or You can just wait, it works, and you don't need to fix it if it ain't broke, and might/will be getting new computer soon.