I have a home built system. I think the specs are not important but I can post them if necessary. I built this system for my niece. After about 6 months the Windows XP got corrupt and the computer would not start. I checked the hard drive and all the files were there so it appears the OS files somehow got corrupt.
I reformatted the hard drive and reinstalled Windows XP. I also put the PC on a surge suppressor. A few weeks later the OS got corrupt again.
This time I installed Ubuntu Linux but after a few weeks it got corrupt a third time.
Then I brought the computer to my house, installed a new hard drive and reinstalled Ubuntu. It ran fine for about 6 months but then again Ubuntu got corrupt and would not start.
My questions is, what is the next likely component that would cause this? I'm thinking either the motherboard or maybe the power supply. What are your thoughts and suggestions.
I would have also thought the RAM would be most likely but you've already tested it with no errors. How long/how many passes did you allow MemTest to run for? Although it's unlikely that errors would occur after the first pass, it is possible since some errors just don't show up until after the computer has been running a while.
A list of your full system specs would help, but at this point it does look as though it could be a motherboard/PSU fault. Do you have another of each that you could swap out to isolate the faulty part? Unfortunately, there's not many methods of testing these other than substitution.
I downloaded and used the MemTest86 boot CD. By default MemTest86 ran 5 passes. I just let it run for a couple hours then came back an noticed it was finished. That's when it said no errors. As for the specs, it's a pretty cheap system. Here is what I know.
Nothing new to add really, other than if you are able to swap them out it may be a good idea so you know which or if any component is causing the issues. I know it's a PITA swapping them out and re-installing etc. but at least you know it's definitely that particular part before you shell out again.
hmm make sure you have last Bios ver...and that your CPU/Chip set are not overheating. You can run Everest http://www.lavalys.com/products/everest-pc-diagnostics you can find tests under tools.
If it pass you can try "burn in test" for example...it will run multiple tests at the same time. Tell us how it go.
Personally i think you have saboteur at your house.