I have a mates laptop I was updating a Tiny P3 it had 98 which had been upgraded to ME so I had re installed ME and was updating IE to v6 rebooted and it came up with Non System Disk on reboot. After taking the disk out and putting it in my Toshiba and FDISK, Formatting and Re Installing from Scratch Windows ME the disk seemed fine ie stable. On putting it back into the Tiny Laptop again it says non system disk if you go into the BIOS it shows the Drive as Disabled tried resetting default BIOS settings but no difference ?? IMO Im pretty sure the HD controller has gone Would you agree ??