I beleive the problem is with the ATI Beta 2 drivers, i think the build number is 5381 not the newest build for Vista, which i believe is 5384.......hopefully over the next week or two ATI can put out a newer beta 2 driver that works with this version of Vista.....

I wa tempted to buy a x800 gto card from newegg and put that on this machine but i would most likely have the same problem.........