I can't use USB keyboard to install Windows XP SP2. But I can install Windows 98 and configure BIOS. I used PS/2 keyboard to complete the installation of SP2. I can use my USB keyboard but I need to Re-install the device after I reboot everytime. Any suggestion about this?? Windows bugs or BIOS problems?? I use Gigabyte GA-K8NS Pro with AMD64 3000+ nForce3 250 Chipest