You can boot your VAIO computer from external devices, such as an optical disc drive, a USB floppy disk drive, or a USB flash drive by using the BIOS function.
The VAIO Care (Rescue Mode) screen appears.
The booting process from the external device starts.
Disconnect all devices from your VAIO computer except for the external device from which you intend to boot up. Some devices cannot be used to boot the computer, or cannot be used with the computer.
If an AC adapter is supplied with the external device, be sure to connect it to an AC power source in advance.