Asus RAMPAGE IV BLACK EDITION AC4 RAMPAGE IV BLACK EDITION User's Manual - Page 132

Secure Boot Allows you to configure the Windows® Secure Boot settings and manage its keys to protect the system from unauthorized access and malwares during POST. OS Type [Windows UEFI mode] [Windows UEFI Mode] Allows you to select your installed operating system. Execute the Microsoft® Secure Boot check. Only select this option when booting on Windows® UEFI mode or other Microsoft® Secure Boot compliant OS. [Other OS] Get the optimized function when booting on Windows® nonUEFI mode, Windows® Vista/ Windows® XP, or other Microsoft® Secure Boot non compliant OS. Microsoft® Secure Boot only supports Windows® UEFI mode. Key Management This item appears only when you set Secure Boot Mode to [Windows UEFI mode]. It allows you to manage the Secure Boot keys. Clear Secure Boot keys Allows you to all the Secure Boot keys, Platform key (PK), Key-exchange Key (KEK), Signature database (db), and Revoked Signatures (dbx) previously applied. All the Secure Boot keys' state will change from Loaded mode to Unloaded mode. The settings are applied after the reboot or at the next reboot. Save Secure Boot Keys Allows you to save the PK (Platform Keys) to a USB storage device. 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, do any of the following: - Press when ASUS Logo appears. - Press after POST. • To select the boot device during system startup, press when ASUS Logo appears. Boot Override These items displays the available devices. The number of device items that appears on the screen depends on the number of devices installed in the system. Click an item to start booting from the selected device. Chapter 3 3-42 Chapter 3: BIOS setup