He's got a P4 1.6 in an Intel 845GV mobo that I was doing some work on, just software updates and such. I did the BIOS update to the P15 from Intel's website. After updating, I lost all PS2 mouse support. I've tried 2 mice known to work and it's a no go even in safe mode. He's running WinXP Pro. If anyone has any ideas, or even better, a copy of the P02 BIOS to flash it back, I will be very grateful!