System Reboot whenever it feels like it, No Virus detected????

[Guest]

To whom can help,
I'm lost at the moment, as of now my computer hasn't decided to do and
automatic reboot in over 3 hrs. but I still think it will considering I did
an adaware, spybot and norton 2005 scan with barely any results, and no
viruses detected by norton, even after it decided to reboot. Check event
viewer but nothing. Maybe has to with the fact that my latest program
installed is stylexp which gives me an error of not for my version of xp
(home build 2600) but works once I click check for updates when I'm online?
Or it could be from this wwII game I downloaded (cheezy but free<key word)
that came with a lot of crap? Scanned, removed that game, basically started
after that game, not the stylexp, remove all the b.s. found, but still
rebooted by itself. Another thing is that I can't do system restore, tried
numerous days (as most recent as possible) but didn't work, even tried to do
system restore in safe mode, no luck. Did I mention had to run the computer
in safe mode to even run full scan of adaware and norton? Well if you have
any suggestions please tell me I would really appreciate it, that being of
not reinstalling.

 

[P.J. Whoopie]

No Blue Screen, nothing in the Event Log, and scans come up clean...? My
bet would be memory failing and/or a thermal problem. Try blowing the duist
out of the power supply and off of the processor fan and see if the MTBF
increases...