Lenovo ThinkPad E575 User Manual page 80

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
Descriptions: Select the boot device when the system wakes from LAN. If Wake On LAN is enabled, the
network administrator can turn on all of the computers in a LAN remotely through network management
software.
• UEFI/Legacy Boot
Values: Both, UEFI Only, Legacy Only
Descriptions: Define the system boot capability.
– UEFI/Legacy Boot Priority
Values: Legacy First, UEFI First
Descriptions: Select the boot priority between UEFI and Legacy.
– CSM Support (for UEFI Only)
Values: Yes, No
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ThinkPad E570, E570c, and E575 User Guide