I have been having the strangest lockups. Here's the story. I own a Sony VAIO. About 2 weeks ago it started randomly locking up. It would take anywhere between 2 minutes to an hour after turning on the computer. Rather than troubleshoot the power supply, video cards and other components, i decided to use it as an excuse to build a new machine, and worry about the Sony later. I ordered all of my parts from newegg.com (great website - great prices and fast shipping). I built the new computer and only brought over a agp vidcard, a pci vid card, a soundblaster and two harddrives from the other computer. I wasn't terribly surprised when the new computer locked up in the same fashion as the old one. I figured bad video card so took them out and replaced the agp with an older one i had sitting. To make this short, as the new computer sits now it has NO components from the old computer... and it still locks up. After racking my brain i decided it was either heat or power related. I've monitored the temp of the CPU using the software that came with the mother board. The highest it has ever read is 38c. It did actually lock up at that time, but it has been known to lock up even at 27c. That pretty much rules out heat. I thought maybe i was having a slight brown-out in my apartment and it was causing the computer to lock up. I've since ruled out that idea for a number of reasons. One, the computer is hooked up to a UPS. And two, I took the computer to the place i work and it locked up there! At this point i do not know what to think. It certainly seems like a hardware problem, but software is the only thing common between the two computers. However, i have the same software running on other computers in my apartment that work just fine. This seems far fetched, but could it be a virus of some sort? When i first hooked up the two HDD from the Sony in the new computer, could they have copied something on the BIOS or Memory, and i am still seeing the effects of it? if this is the case, how could i find the virus? ... or could one of the video cards have actually damaged the mobo and caused it to act the same as the other computer? That is about all i can think of right now. I am going to install win2k instead of XP pro tomorrow, and see what happens, but I would love to hear some other ideas. Feel free to email me at amcintosh_23@yahoo.com. Thanks in advance.