Computer keeps restarting

Genralkidd

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I'm pretty sure this is a problem with the motherboard and perhaps partially the OS.

I'm using a VIA EPIA 800AG (Samuel 2 @ 800 MHz) Motherboard running Windows 2000, 1 GB RAM and 40 GB SSD, plus a CD Drive. It's a pretty old motherboard, but it's never been used until now so it's technically still pretty new.

It seems whenever the system is under heavy CPU loads or perhaps reading a lot of data from the SSD, it will just instantly restart with no warning. Sometimes I can't even get past the login screen without it suddenly restarting. I'm pretty sure it's not a heat problem because I did leave it off for several hours before I tried turning it on again and it still instantly restarted right after logging in.

Is there a reason this is happening? Is the motherboard not getting enough power (I'm using a mini-itx power supply since it is a mini-itx motherboard). Or is the CPU really overheating that quickly? It doesn't seem to be a problem with Windows 2000 itself. I'm trying to use this computer as a low power FTP server, but it's useless to me if I can't keep it on.

This problem happened more frequently after I installed Avast! Antivirus free edition. In fact, whenever I try to run CPU-Z, it will instantly restart the system every time. That makes me think that perhaps whenever an application tries to access low level hardware features, the CPU rejects it and restarts. I looked in the BIOS to see if there was any kind of setting related to this, but the only thing that I've never seen before in a BIOS was a Virus Alert which I believe only happens pre-boot. If anyone has any solution or workaround to this, I'd really appreciate it. Thanks!
 

Genralkidd

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Is there anyway to fix that?

Also, I have yet to try a new power supply, but I think the problem might be somewhat related to the RAM. During one of the several reboots, I got an error message saying taskmanager could not be read from memory, shortly after, the system restarted. A few reboots later, Windows 2000 got a blue screen saying "KMODE_EXCEPTION_NOT_HANDLED, Beginning dump of physical memory". It actually stays on this blue screen instead of automatically rebooting like normal blue screens are supposed to do. I did not make any modifications to the OS that would cause a blue screen. I ordered two new sticks of RAM, until then, if I just use one stick of RAM, the reboot problem still happens regardless of which stick of RAM I use. Those two sticks of RAM were salvaged from a very old computer from 1998 though so they could've deteriorated a bit.

Ok, after more testing, im starting to think the problem might've been windows 2000 itself. I tried installing Linux (debian) and so far its not causing any shutdowns. I'll keep testing though. I feel like this kind of problem shouldn't be caused by the os.
 

Genralkidd

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At this point I'm almost fully positive that the problem is not with the power supply or the RAM even though Windows 2000 had a couple blue screens related to memory problems. Anyways, I've narrowed the problem down to a few possible causes. It's either the motherboard capacitors as you guys have suggested or it might actually be the OS, Windows 2000 that's causing it. The particular installation of Windows 2000 was an upgrade install from Windows ME. I know it's an unusual upgrade that's not officially supported, but works regardless. I tried installing Debian Linux and the system works perfectly now without anymore reboots, although performance is a bit laggy which is understandable. I'm going to try a clean install of Windows 2000 the next time I get a chance to.

Now if the problem really is related to the motherboard capacitors, is there any way to fix those? Or perhaps could I try increasing the voltage of the MB through the BIOS in order to compensate for any lost current (sounds kind of dangerous to me)?