User Manual

ASUS TUF Z270 MARK 2 BIOS Manual
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Key Management
Clear Secure Boot keys
This item allows you to delete all the previously applied secure boot keys.
All the secure boot keys states will change from loaded to unloaded. Save
changes and reset the system for the change to take effect.
Save Secure Boot Keys
This item allows you to save all the secure boot keys to a USB storage
device.
PK Management
The Platform Key (PK) locks and secures the rmware from any
permissible changes. The system veries the PK before your system enters
the OS.
KEK Management
The Key-exchange Key or Key Enrollment Key (KEK) manages the
Signature database (db) and Revoked Signature database (dbx).
DB Management
The Authorized Signature database (db) lists the signers or images of UEFI
applications, operating system loaders, and UEFI drivers that you can load
on the single computer.
DBX Management
The Revoked Signature database (dbx) lists the forbidden images of db
items that are no longer trusted and cannot be loaded.
Boot Option Priorities
These items specify the boot device priority sequence from the available devices. The
number of device items that appears on the screen depends on the number of devices
installed in the system.
• To access Windows
®
OS in Safe Mode, press <F8> after POST (Windows
®
8 not
supported).
• To select the boot device during system startup, press <F8> when ASUS Logo
appears.
Boot Override
These item displays the available devices. The number of device items that appears on the
screen depends on the number of devices installed in the system. Select an item to start
booting from the selected device.