XP reboot issue.

Specs

HP A220N
512 DDR 333 ram
1230 GB hard Drive
AMd ATHlon xp
Gforce fx 5200plus 128 mb ram
audigy
120 GB maxtor DMA hard drive
other O/Ses
FreeBSD
Mandrake 10CE
Mepis


first i cant reninstall xp because of linux
secondly everything works smoothely in linux
but xp on the other hand ( instances of reboot)
-i go to control panel reboot
-i went to the device config through run and found my ethernet controller was messed reinstall drivers 50% reboot
-change audios level reboot
thats about it but it makes it quite a pain.
so um what should i do
i ran spybot adaware AVG personal and defrag and manually went through the reg and found nothing and got all the updates
need help.
Thanks in advance

 

In XP, right-click My Computer, go to Properties > Advanced > Startup and Recovery > UNcheck Automatically Restart and Check Write an event to the System Log

Next time it happens instead of rebooting you should get a "Blue screen of Death" with some important info on it. Post that info back here please.