Hi,
On a few occassions with previous PCs I ran into BSOD errors because my BIOS and/or Graphical memory addresses were being shadowed. Sometimes I ran into conflicts with MMedia drivers, on other ocasions into graphical problems. The use of this shadowing mostly was to get as much low memory free as possible and to make the memory usage run faster.

In simple terms shadowing means: make a copy of a range of addresses (BIOS, Graphic pointer etc.), put them somewhere else in memory and tell the PC to make use of those copies instead of the originals.

You can find info on whether your BIOS etc. is being shadowed in your BIOS Setup. When you boot up the PC you have got the option of hitting F1 (on my PC) or another key to enter Setup. Search for shadowing options in the Setup, probably in some Advanced Options. Should you have such options, write down their settings (NEVER forget that!!!). Disable enabled options, save the settings and reboot.

If the PC runs fine, test P5. If P5 runs (hopefully), get back into your BIOS Setup and enable the options you disabled one by one. Each time reboot and test P5. You finally will find the booger harrassing you all this time.

If the PC does NOT run fine, reboot and get back to your BIOS Setup and enable the settings you disabled one by one, reboot and keep doing this step until your PC runs fine again. As a last resort, use the BIOS reset option of the BIOS Setup.

IMPORTANT: when you are totally unfamiliar with BIOS and BIOS Setup, have someone with more knowledge do it for you, we don`t want to mess up your PC, do we?

Hope this helps you further, mail me at maxxarcher@hotmail.com if you need more info.
MaxxArcher