Startup Menu - Lenovo ThinkPad E570 User Manual

Secure Boot
• Secure Boot
Values: Disabled, Enabled
Descriptions: Enable this option to prevent unauthorized operating systems from loading when you
turn on the computer.
Disabled is the default value when OS Optimized is set toDisabled. Enabled is the default value when
OS Optimized is set toEnabled.
Note: To enable Secure Boot, you need to set the startup setting as UEFI Only and set CSM Support
as No.
• Platform Mode
Values: Setup Mode, User Mode
Descriptions: Specify the system operating mode.
• Secure Boot Mode
Values: Standard Mode, Custom Mode
Descriptions: Specify the Secure Boot mode.
• Reset to Setup Mode
Descriptions: 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.
• Restore Factory Keys
Descriptions: Use this option to restore all keys and certificates in Secure Boot databases to the 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 the operating systems.
• Clear All Secure Boot Keys
Descriptions: Use this option to clear all keys and certificates in Secure Boot databases and install
your own keys and certificates.
Intel (R) SGX
• Intel (R) SGX Control
Values: Disabled, Enabled, Software Controlled
Descriptions: Enable or disable the Intel Software Guard Extensions (SGX) function. If you select
Software Controlled, SGX will be controlled by the operating system.
• Change Owner EPOCH
Value: Enter
Descriptions: Change Owner EPOCH to a random value. Use this option to clear SGX user data.
Note: This sub-menu is available on models with an Intel CPU.

Startup menu

Note: The BIOS menu items might change without notice. Depending on the model, the default value
might vary.
• Boot
Descriptions: Define the startup sequence.
• Network Boot
.
Chapter 6 Advanced configuration
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