Reboots on Power Down

Reboots on power down.

When I go to shut down my PC, it goes through the motions of Saving Settings,
Shutting Down, Power Interrupts (stutters) but then it reboots itself and
comes back to life as if I just booted normally.
The only way I can shut down is by holding in the power button to shut off
completely.

I have been dealing with this problem for almost a year trying different
solutions that have been posted on the net. but so far nothing has worked.
Including the recommendations Posted on this site.
I have a high-end costumed built pc, running XP pro. (2nd Edition) I have
all the latest drivers, updates installed. I had the system running under a
RAID 0, and recently re-formatted to a RAID 1 configuration to try to solve
this problem.

My latest Clean System install using the latest divers and widows updates and with only my Microsoft USB Explorer mouse, Natural Keyboard and Dell LCD monitor hooked up. NO ADDITONAL SOFTWARE PROGRAMS INSTALLED!

Right from the start, the system will reboot after a shutdown. Same as my
previous system install as a RAID 0 config.

Notes: I had an Antec 480 PSU installed, which is recommend by INTEL. My
latest solution was replacing my Power Supply; Now I have a brand new Antec
550HE PSU installed. Did not solve the problem...reboots on power-down. I
have additional software installed now, including Bitdefender and Spyware
Doctor.

HARDWARE SETUP:
Thermaltake SHARK Case.
Intel P865PERL MB - BIOS Ver. p21 (latest posted).
Intel P4 3.4GHz, HT. Bus speed 800MHz (system recognized as a dual
processor).
1023 MB Mem.
Nvidia GeForce 6600GT Video Card (Latest Drivers installed)
Antec 550HE Power Supply.
Dual (x2) WD 250 Gig HDD.
Liteonit DVD-R Disk Drive. (Latest firmware installed).
Liteonit CD-R Disk Drive. (Latest firmware installed).
Std. Floppy Drive.
Intel 536EP Modem.
Microsoft Natural PS/2 Keyboard.
Microsoft USB IntelliMouse Explorer 4.0 (IntelliPoint).

No problem devises reported.

I know, I do not have a software problem from third venders. The only other source of the problem could be (other then GETTING RIDE OF MICROSOFT XP), is the Microsoft mouse and keyboard? I have tried changing the power settings for each of the hardware devices such as mouse and LAN.

I am at my end...NEED HELP FROM SOMEONE WHO CAN HELP!

Nothing in Event Viewer for clues and no Blue Screens of Death!
No 3rd party Programs...like Roxie Easy CD Creator.
Automatic Recovery has been unchecked and then Checked, everything that has
been posted at this point I have tried!

NOTE: The only thing I have a feeling about is the BIOS.
THE PROBLEM ACCURED RIGHT AFTER I UPGRADED TO A NEW INTEL 3.4 PROCESSOR WITH
HT. HAD TO INSTALL THE LASTEST BIOS FROM VER. P19 TO P21 FOR THE NEW
PROCESSOR TO FUNCTION CORRECTLY.
IT IS NOT AN OPTION TO GO BACK TO BIOS VER P19. <<<

I have contacted Intel, submitted a couple of support e-mails with no
response from them! I would thick Microsoft would have a direct line to them
that works?


ANYONE RECOMMEND A DIFFERENT O/S SYSTEM????? <<<

Awaiting HELP, HELP, HELP, HELP, and HELP.

Regard's
Robert T.

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