Try going into the BIOS (Boot the machine up and hold down the?Esc? key, then press F1 when you get the check system message. You are then in the BIOS Setup and you can make your changes and save and exit by pressing the ?End? key.) and setting the first boot device to cd. If you are using Windows 2000 or XP you can then reload you O/S if on Windows 9X then post back saying which.