Asus ROG STRIX B250F GAMING STRIX B250F GAMING BIOS ManualEnglish - Page 32

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 [Other OS] Allows you to select your installed operating system. [Windows UEFI mode] This item 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® non-UEFI mode. Microsoft® Secure Boot only supports Windows® UEFI mode. Key Management This allows you to manage the Secure Boot keys. Clear Secure Boot keys This item appears only when you load the default Secure Boot keys. This item allows you to clear all the previously applied Secure Boot keys. Save Secure Boot variables 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 firmware from any non-permissible changes. The system verifies the PK before your system enters the OS. Save to File This item allows you to save the downloaded PK to a USB storage device. Set New Key This item allows you to load the downloaded PK from a USB storage device. The PK file must be formatted as a UEFI variable structure with time-based authenticated variable. Delete Key This item 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. KEK Management The KEK (Key-exchange Key or Key Enrollment Key) manages the Signature database (db) and Revoked Signature database (dbx). Key-exchange Key (KEK) refers to Microsoft® Secure Boot Key-Enrollment Key (KEK). Save to File Allows you to save the downloaded KEK to a USB storage device. Set New Key Allows you to load the downloaded KEK from a USB storage device. 32 BIOS Setup