I have assembled a new computer using AMD Sempron 3000+ on an ASUS K8V-MX motherboard, Kingston KVR 400/256MB RAM, Maxtor DiamondMax Plus 9 80GB HDD. There are no expansion cards installed, but do have front panel USB ports. Whenever I boot the computer, Windows will run for various amounts of time before locking up, when I attempt to reboot I get nothing until I clear the CMOS, but then the sequence repeats. Sometimes Windows (XP Home) runs for 10 seconds, sometimes for several hours???