Hi! First time poster looking for a little help. I'm building a system around an Intel DX38BT motherboard. I was able to install XP fine. After I installed the MB device drivers and rebooted, the USB ports became unresponsive. I can get into and manipulate BIOS fine, but once the bootcodes disappear it seems like all the USB ports lose power - the numlock on the keyboard and the laser on the mouse go out. Windows boots, and hitting the power switch causes Windows to initiate a shutdown, so the system isn't locked. I've tried the following: Booting from the DVD drive - system doesn't respond to KB at the "Press any key to bood from CD" prompt. Tried all available USB ports Removed all non-essential hardware (including FP USB ports) Reseting BIOS to "Optimal" settings Resetting BIOS using the HW jumper Removing all hardware and reseating the motherboard Replacing the CPU (longshot, but I was getting desperate...) Removing the hard disk on the off chance USB drivers loaded *very* early Booting from a USB drive (yea, I thought it was pointless too, but again...) None of the above helped. I'm leaning towards "there's an issue" with the mb, but can't explain why installing new drivers in Windows would cause the issue. Thoughts..?