Updating Your System Uefi Bios - Lenovo ThinkPad T520 User Manual

Startup menu items
Table 10. Startup menu items
Menu item
Boot
Network Boot
UEFI/Legacy Boot
UEFI/Legacy Boot Priority
Boot Mode
Option Keys display (ThinkVantage
button message)
Boot Device List F12 Option
Boot Order Lock

Updating your system UEFI BIOS

The Unified Extensible Firmware Interface (UEFI) BIOS is a part of the system programs that make up the
basic layer of software built into your computer. UEFI BIOS translates the instructions from other software
layers.
Your computer system board has a module called electrically erasable programmable read-only memory
(EEPROM, also referred to as flash memory). You can update UEFI BIOS and the Configuration/ThinkPad
Setup program by starting your computer with a flash update optical disc or flash update tool application
running on the Windows environment.
In some instances when you add software, hardware, or a device driver, you may be informed that you need
to update your UEFI BIOS in order for the new addition to work properly.
216
User Guide
Selection
• Both
• UEFI Only
• Legacy Only
• UEFI First
• Legacy First
• Quick
• Diagnostics
Note: You can also enter the
"Diagnostic" mode by pressing Esc
during POST.
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
Comments
Refer to "Startup menu" on page 204.
Refer to "Startup menu" on page 204.
Select system boot capability.
• Both: System will boot by
following UEFI/Legacy Boot
Priority setting.
• UEFI Only: System will boot from
UEFI enabled OS.
• Legacy Only: System will boot
from any OS other than UEFI
enabled OS.
Note: If you select "UEFI Only",
system cannot boot from the
bootable devices which do not have
UEFI enabled OS.
Select priority of boot option between
UEFI and Legacy.
Screen during POST:
• Quick: ThinkPad Logo screen is
displayed.
• Diagnostics: Text messages are
displayed.
If you select "Disabled", the "To
interrupt normal startup, press the
blue ThinkVantage button." message
is not displayed during POST.
If you select "Enabled", the F12 key
is recognized and the Boot Menu is
displayed.
If you select "Enabled", the Boot
Priority Order is locked for your future
use.