I have a machine running win2k. I have swapped power supplies and mother boards(from new ASUS to new Intel). 733 PIII with 128 meg RAM. All drivers are from win2k (video, sound and printer). With both motherboards and power supplies the result is the same. The machine will run fine for a few days and then for no good reason it will simply shut down completely or reboot. I have installed drivers for a UMAX scanner. This behaviour is present whether you are scanning or not scanning. It is completely random. This is the only machine I have seen with this problem. Machine is attached to a UPS. any ideas?