Startup Menu - Lenovo ThinkPad P40 Yoga User Manual

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Table 4. Security menu items (continued)
Menu item

Startup menu

To change the startup settings of your computer, select the Startup tab from the ThinkPad Setup menu.
Attention:
• After you change the startup sequence, ensure that you select a correct device during a copy, a save, or a
format operation. Otherwise your data might be erased or overwritten.
• If you are using the BitLocker drive encryption, do not change the startup sequence. BitLocker drive
encryption locks the computer from starting once detects the change of startup sequence.
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ThinkPad P40 Yoga, ThinkPad S3, ThinkPad Yoga 14, and ThinkPad Yoga 460 User Guide
Submenu item
Platform Mode
Secure Boot Mode
Reset to Setup Mode
Restore Factory Keys
Clear All Secure Boot
Keys
Selection
Comments
Select Enable to prevent
unauthorized operating systems
from running at boot time.
Select Disabled to allow any
operating systems to run at boot
time.
Note: This item is set as Disabled
by default when the OS Optimized
Defaults on the Restart menu is
set as Disabled. This item is set
as Enabled by default when the
OS Optimized Defaults is set as
Enabled.
• User Mode
Specify the system operating mode.
• Setup Mode
• Standard Mode
Specify the Secure Boot mode.
• Custom Mode
• Yes
This option is used to clear the
current platform key and put the
• No
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.
This option is used to restore all
keys and certificates 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 certificate for Windows 10
operating system.
This option is used to clear all keys
and certificates in Secure Boot
databases. You can install your own
keys and certificates after selecting
this option.

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