I don't know what I've done but my PC will not now boot after it's been shut down. It starts the boot process but takes ages to get to the point where I need to enter a BIOS password but the keyboard isn't recognised so nothing happens. If I then press the Restart button then the PC boots fine and I can type the password and it then goes on to start up Windows XP. A quick run down of some things that might be pertinent. I have 2 external (USB) hard drives which I use for backup purposes One of them powers down when the computer is off, the other is on all the time. My BIOS is set to ignore all boot media except the hard drive. I use a zero RAID array on my main hard drive. Any ideas guys?