The system BIOS (system configuration) provides the option for setting the BOOT PRIORITY (start-up sequence). You may need to change the BOOT PRIORITY to specify the device you would like to start from first. Depending on the manufacturer of your system, you can press the DEL key, the F2 key or the F12 key the moment after turning on the computer's power. Some systems allow you to change the BOOT PRIORITY on power-up simply by holding down the C key for the CD-ROM device. If you are not sure, consult the User Guide that came with your computer or call the manufacturer's technical support for assistance.