I am trying to help out my daughters friend who's computer keeps freezing up at various times. It a 1.4 with 512 of ram running windows XP Pro. What I have tried so far to find the problem: I ran scanrite on the hard drive (30gig) appears ok. I have swapped the memory, still freezes. Formatted the hard drive and re-installed windows, still freezes. Previously it would freeze doing any number of various things. Even just sitting inactive it would freeze up. She tookit back to where she bought it, they just keep charging her money without solving the problem, they say its because she is running the sims online. Well I did a clean install and it is still freezing up, no sims online intalled. I have many spare parts so I could try swapping everything one at a time but that still might not solve the problem. Does anyone have any ideas on what I should try, or is there some type of program that can find the problem?

I would go after two things. The video card and the power supply unit. I would start with replacing the video card and if problems still persist I would replace the PSU. This is where I would start. You have one of the hardest issues to troubleshoot. Random lock ups and no error message. Good luck, KTTD

I would also check The hard drive, IDE cable, IDE channel.

Here is where I am at right now. I am able to make the computer freeze up doing a couple things at once. I am updating files from the Microsoft Site, and defragging the hard drive at the same time. When I move the mouse around doing these 2 things the computer will freeze. I tried changing the video card and ide cable, still freezing doing the same 2 things. I am guessing that that is a clue, but I can't figure it out. I have not changed power supply yet, I will try that also. I have also cleaned the fans and taken all cards out and re seated them. Still trying.....

Well never defrag and do anything else at the same time. That is a 100% way to lock up a system. I would replace PSU and see what happens. KTTD

Nope, not the power supply, Is there some type of diagnostic software for this type of proplem?