Weird PC rebooting problem

My 2nd PC based on the Intel 865 PERL and the P4 2.8GHz reboots when I click
on "Turn Off" in XP SP2 w/ all updates.

I *disabled* "Automatically restart PC in critical errors."

Here's what's happening.

-The PC is ultra reliable when it's on. It reboots only when I turn it
off. --> Thus, I doubt that my problem is hardware-related, but who knows?
-The rebooting problem happens even in the safe mode.
-I examined log files but couldn't find info about some driver crashing
during the shutdown period.

I am at my wit's end. Well, I can reinstall XP to see if it can solve the
problem. But I need to have an idea about what could cause this strange
rebooting.

Give this site a look for an answer.
http://www.aumha.org/win5/a/shtdwnxp.php

"FKS" <fks RemoveThis @fks.com> wrote in message news:ZkG7i.6194$rF.3055@newsfe12.lga...
> My 2nd PC based on the Intel 865 PERL and the P4 2.8GHz reboots when I
> click on "Turn Off" in XP SP2 w/ all updates.
>
> I *disabled* "Automatically restart PC in critical errors."
>
> Here's what's happening.
>
> -The PC is ultra reliable when it's on. It reboots only when I turn it
> off. --> Thus, I doubt that my problem is hardware-related, but who knows?
> -The rebooting problem happens even in the safe mode.
> -I examined log files but couldn't find info about some driver crashing
> during the shutdown period.
>
> I am at my wit's end. Well, I can reinstall XP to see if it can solve the
> problem. But I need to have an idea about what could cause this strange
> rebooting.
>