Hello, I just recently bought a new 80 gig harddrive. So I simple took out my old one. Replaced it with my new one and reconnected the same wires. I told my bios to boot from cd and inserted my windows XP home into my cd-rom. I get an error message: "DISK BOOT FAILURE. INSERT SYSTEM DISK AND PRESS ENTER" Any suggestion? I dont even really know what system disks mean... any help would be much appriciated. Thank you for your time.