Select Legacy BIOS or UEFI Boot Mode
The BIOS firmware supports both Legacy BIOS Boot Mode and UEFI Boot Mode. The
default setting is Legacy BIOS Boot Mode. For more information about selecting
the boot mode, refer to Using UEFI.
Access the BIOS Setup Utility menus.
See Access BIOS Setup Utility Menus.
From the BIOS Main Menu screen, select Boot.
The Boot Menu screen appears.
From the Boot Menu screen, use the up and down arrow keys to select
UEFI/Legacy BIOS Boot Mode, and then press
The UEFI/BIOS dialog box appears.
You cannot configure the boot device priority after switching the boot
mode. A system reboot is required to properly populate the Boot Options
Priority list with devices that support the chosen boot mode.
Use the up and down arrow keys to select the appropriate Legacy or UEFI
mode, and then press Enter.
Press the F10 key to save the changes and exit the BIOS Setup