Hi everyone on the forums. Im new here but i think this might be the best place to post this. I have 2 macpro´s, 1 at work and 1 at home both are running Vista64 with out any issues EXEPT the freesing issue on the one at home. The one i have at home is a Dual Quad Harpertown @2.8ghz, 16gb ram, 8800GT gfx card and i have ocational freezes when the computer is left for some time. (like over night).IT totaly locks upp and i need to shut it down by holding the power button) It has no power management running (not going to sleep or anything). Its pretty identical to the previous thread about the same issue on OS X. Starting to thing it might be a heat problem with the 8800 GT card. The on at work is a Dual Quad Clovertown @ 3ghz, 16gb ram, with a Quadro 5600 FX gfx card and it has no issues what so ever. the Os setup is the same and all apps are the same. Ive tryed updating the Display adapter driver but no results. I also have a Wacom board on both machines. Anyone had the same problem?