Installing an operating system or launching some recovery programs requires you to boot from a CD or DVD. When a bootable CD is present in the drive, some Sony VAIO models automatically boot from it. But some models require you to adjust the boot sequence by entering the BIOS, or setup. Positioning the CD drive to the highest position in the boot sequence tells the computer to boot from a CD before attempting to boot from the hard drive.
Insert the bootable CD into the CD drive and reboot your computer. If the computer is preconfigured to boot from a CD, it automatically does so.
Look for a notice stating "Press XXX to enter BIOS Setup" or "Press XXX for Boot Menu." Make a note of the keys.
Press the key that corresponds to the notice "Press XXX for Boot Menu" continuously while rebooting. If you didn't see such a notice, press "F11" or "F12," which are the most common keys. Highlight the CD drive, using your arrow keys, and press "Enter" to boot from it. If you still don't enter the Boot menu, then your model may not have that feature.
Press the key that corresponds to the notice "Press XXX to enter BIOS setup" continuously while rebooting. If you didn't see that notice, then try "DEL," "ESC," "F1," "F2" or "F10."
Navigate to "Boot Sequence" or "Advanced Boot Options" using your arrow keys, and locate the section that lists the boot order. This is a list of bootable devices, such as hard drives, CD drives, floppy drives and possibly USB devices.
Highlight the first position using your arrow keys, and press "Enter." Highlight the CD drive and press "Enter" to select it as the first boot device. In some VAIO models, the procedure requires you to highlight the CD drive and press "+" to move it up to the first position.
Press "F10" to save and exit BIOS, then reboot from the CD.
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