Step1. Please reboot your computer and pres 'F2' or 'Delete' or "F10" to enter your BIOS setup.
Step2. Looking for a tab or menu relating to booting in the BIOS setup software's opening screen. In this example, it's simply called "BOOT," and can be accessed by using the tab and/or arrow keys to highlight the word "BOOT" on the menu bar. Once there, hit enter, and you'll see a submenu that's specific to how the PC boots.
Step3. Using the tab and/or arrow keys,make sure your CD-ROM is setup to boot before your hard disk.
Step4. Press 'F10' and 'Y' followed by 'ENTER' to save the new BIOS settings and reboot your computer.