This is an issue i've been having with windows xp 32bit professional edition. I've used out of the box video drivers and updated drivers from ati. The card is radeon x1650 HIS The motherboard is MSI k8t800 This computer currently has service pack 2 and all the updates. I've switched OS to XP 64bit and had no problem with the computer locking up and the monitor shutting off. However that was a whole other ordeal with trying to get service pack 2 to install. So i went back to 32 bit edition and am once again having this issue. I'm not sure if it's video driver related or what, if anyone has any idea or a hint of a direction i should pursue i would be very grateful, thanks.