I've had exactly the same problem with my ASUS V8460 Ultra Deluxe. I've tried both Win98SE and WinXP Home with the same result so it's not the operating system. ASUS don't seem to respond to emails from users either, just distributors. I've got an ASUS P4S8X Motherboard and P4 2.53GHz CPU and 512MB DDR RAM. If anybody has some idea what's going on then I'd love to hear from them as this 1 nagging problem is spoiling what should be a great system.