Let's say I just install XP and only use Microsoft's motherboard drivers and maybe a video driver. That machine would likely crash randomly. The cause is the outdated BIOS or motherboard drivers if not a hardware issue.
Your post does not supply the gritty details to write "do this" so I have to note the usual issue.
I've got an Athlon 2200+ desktop with 512MB ram. I am not certain of the exact specification but I'll have a look and post it here. The problem I'm having is that whenever I connect ANY wireless device to the system, be it a PCI card or a USB device (I have tried D-Link and Netgear models) the system just randomly crashes. The crashes are the kind where even though the system doesn't appear to be under and strain it all just stops, and they happen totally randomly - it could be after 5 minutes or 3 hours. I have run the system without the wireless devices and it will stay on for days with no problem.
Any thoughts would be greatly appreciated!