Lenovo I53427U180SSD Tablet User Manual


 
Table 6. Security menu items (continued)
Menu item
Submenu item Selection Comments
Secure Boot
Disabled
Enabled
Enable or disable the
UEFI Secure Boot feature.
Select Enable to prevent
unauthorized operating
systems from running at
boot time. Select Disabled
to allow any operating
systems to run at boot time.
Platform Mode
User Mode
Setup Mode
Specify the system
operating mode.
Secure Boot Mode Standard Mode
Custom Mode
Indicates Secure Boot
mode is standard mode or
custom mode.
Reset to Setup Mode
This option is used to clear
the current platform key
and put the system into
setup mode. You can install
your own platform key and
customize the Secure Boot
signature databases in
setup mode.
Secure Boot mode will be
set to custom mode.
Secure Boot
Restore Factory Keys This option is used to
restore all keys and
certicates in Secure
Boot databases to factory
defaults. Any customized
Secure Boot settings
will be erased, and the
default platform key will be
re-established along with
the original signature
databases including
certicate for Windows
8 operating system.
Startup menu
You might need to change the startup sequence of your computer. To do so, select Startup from the
ThinkPad Setup main menu.
Attention:
After you change your startup sequence, you must be extremely careful not to specify a wrong device
during a copy, a save, or a format operation. If you specify a wrong device, your data and programs
might be erased or overwritten.
If you are using the BitLocker drive encryption, you should not change the startup sequence. BitLocker
drive encryption detects the change of startup sequence and locks the computer from booting.
Chapter 6. Advanced conguration 81