As boot-up begins a black screen with the message "Remove disks or other media. Press any key to restart." comes up. There are no disks other than the hard drive present. No floppy drive is installed. Floppy controller is turned off in the BIOS. No CD's are in the CDROM drives. Upon pressing "any key" the system finishes booting. Why does the message occur, on every boot? How do I fix it???