Asus B75M-A B75M-A User's Manual - Page 78

Boot from PCIe/PCI Expansion Devices [Legacy OpROM first] Allows you to select the type of PCIe/PCI expansion devices that you want to launch. Configuration options: [Legacy OpROM first] [UEFI driver first] 2.7.10 Security 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] Allows you to select your installed operating system. [Windows UEFI mode] Executes 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® non-UEFI mode, Windows® Vista/XP, or other Microsoft® Secure Boot non-compliant OS. Only on Windows® UEFI mode that Microsoft® Secure Boot can function properly. The following item appears when OS Type is set to [Windows UEFI Mode]. Key Management This item appears only when you set Secure Boot Mode to [Custom]. It allows you to manage the Secure Boot keys. Manage the Secure Boot Keys (PK, KEK, db, dbx) Clear Secure Boot keys This item appears only when you load the default Secure Boot keys. This item allows you to clear all default Secure Boot keys. PK Management The Platform Key (PK) locks and secures the firmware from any non-permissible changes. The system verifies the PK before your system enters the OS. Load PK from File Allows you to load the downloaded PK from a USB storage device. Copy PK to File Allows you to store the PK to a USB storage device. Delete PK Allows you to delete the PK from your system. Once the PK is deleted, all the system's Secure Boot keys will not be active. Configuration options: [Yes] [No] The PK file must be formatted as a UEFI variable structure with time-based authenticated variable. 2-32 Chapter 2: Getting started