Question : How to get a Dell D800 to load Bios fully?

I had that stupid anti virus shiled virus and used Combofix to remove it.  When I tried to reboot the Bios stops loading at what looks to be about 95&.  Is there anyway to force a full reset to get this bios to load.  It seems to be hung.  It might be currupted but I don't know how to load a new bios if the computer won't boot.  ANy thoughts?

Answer : How to get a Dell D800 to load Bios fully?

If edbedb's guess is correct, I would also unplug all peripherals before booting, especially any USB devices.