Stick a blank floppy in the floppy drive if your running me, 98, 95, (2000 not sure) go to control panel\ad new program\create startup disc. Reboot the computer with the disc in the drive dos will lode select start computer with CD ROM support type format C: and you got it from there. If you're running WIN XP it’s a different story. If you are win XP or have any problems let us know. You can use a DOS boot from another even if it has a deferent OS