I have had a problem for a few months with my puter rebooting. Well actually it had happened off and on, but not real frequently when suddenly it got worse and then my puter crashed(and when it tried to reboot some file was missing. It went to repair shop who checked the hard drive, the RAM and the motherboard and also checked for viruses etc that could be causing the problems. They also had to do a complete reinstall of stuff from the recovery disc I had thankfully gotten around to making!! Actually I also had them add 1 Gb of RAM too since I only had 512 Mb. They did also save some files I said I wanted saved.
Anyway I discovered shortly after I got it home it was still rebooting. I called the shop and their prediction at that time is its one of 3 things. They said maybe the original RAM is failing, the HD is failing OR the motherboard is failing. I have not gotten brave enough to try yanking the original 512 Mb of RAM yet, but I just dont quite believe that is it. I also live in a very old house and wondered about the electricity. I did for some reason decide maybe it had to do with turning the computer on and off was hard on it, since the times I was most likely to have it reboot was shortly after I turned it on. So I have left it on most of the time while shutting everything else off. I did get a different surge protector, and this one has several indicator lights on it. It was indicating line faults on the outlet I had it plugged into. I then switched it to one of the few other grounded outlets in the house and since then it does reboot occassionally but not very often. Nothing else is used on the other outlet but will get some electrician to deal with that.
I can tell when it reboots because one of those HP programs has some file missing so if the puter has rebooted that little box shows up saying it cant start that program(something like HP organize and I never used it so dont care). BUT it does mean I can tell for sure if the puter HAS rebooted.
So it looks like I have to try pulling the RAM(cheapest fix cuz I would still have 1 Gb of it); try a different HD and see if that solves it, or if its the mother board the repair place said to buy a new computer. BUT I have Windows XP and dont really want to go to Vista, so am not crazy about buying a new puter until the next Windows version comes out. I also hate spending around $75 for a new HD and then find out the HD is fine and I still have to get a different computer.
My question is if the problem is from something the line faults on the other outlet did to the puter, is it more likely to be the motherboard? Or is it still a toss up between the HD and the motherboard. The repair place said they had no idea which, of course when I talked to them I had NOT found out about the line faults on that outlet. I hoped when i switched to another grounded outlet the puter would stop rebooting. It still does but not very often and only once messed up a program I was working on. I will also admit I have not bothered to load much of the software back on the puter until I find out it is up and running OK!
I held off on dealing with this cuz I was also dealing with major vehicle issues. That is hopefully solved and I guess its time to deal with this.