Asus PRIME X370-A User Guide - Page 51

Secure Boot, Boot from PCI-E/PCI Expansion Devices [Legacy Only]

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Launch CSM [Enabled] [Auto] The system automatically detects the bootable devices and the add-on devices. [Enabled] For better compatibility, enable the CSM to fully support the non-UEFI driver add-on devices or the Windows® UEFI mode. [Disabled] Disable the CSM to fully support the Windows® Security Update and Security Boot. The following four items appear when you set Launch CSM to [Enabled]. Boot Device Control [UEFI and Legacy OPROM] Allows you to select the type of devices that you want to boot up. Configuration options: [UEFI and Legacy OPROM] [Legacy OPROM only] [UEFI only] Boot from Network Devices [Legacy only] Allows you to select the type of network devices that you want to launch. Configuration options: [Ignore] [Legacy only] [UEFI driver first] Boot from Storage Devices [Legacy Only] Allows you to select the type of storage devices that you want to launch. Configuration options: [Ignore] [Legacy only] [UEFI driver first] Boot from PCI-E/PCI Expansion Devices [Legacy Only] Allows you to select the type of PCI-E expansion devices that you want to launch. Configuration options: [Legacy only] [UEFI driver first] 2.8.4 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 all Secure Boot variables This item allows you to save all the Secure Boot keys to a USB storage device. Chapter 2: BIOS information 2-30

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2‑30
Chapter 2: BIOS information
Launch CSM [Enabled]
[Auto]
The system automatically detects the bootable devices and the add‑on
devices.
[Enabled]
For better compatibility, enable the CSM to fully support the non‑UEFI
driver add‑on devices or the Windows
®
UEFI mode.
[Disabled]
Disable the CSM to fully support the Windows
®
Security Update and
Security Boot.
The following four items appear when you set Launch CSM to [Enabled].
Boot Device Control [UEFI and Legacy OPROM]
Allows you to select the type of devices that you want to boot up. Configuration options:
[UEFI and Legacy OPROM] [Legacy OPROM only] [UEFI only]
Boot from Network Devices [Legacy only]
Allows you to select the type of network devices that you want to launch. Configuration
options: [Ignore] [Legacy only] [UEFI driver first]
Boot from Storage Devices [Legacy Only]
Allows you to select the type of storage devices that you want to launch. Configuration
options:
[Ignore] [Legacy only] [UEFI driver first]
Boot from PCI-E/PCI Expansion Devices [Legacy Only]
Allows you to select the type of PCI‑E expansion devices that you want to launch.
Configuration options: [Legacy only] [UEFI driver first]
2.8.4
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 all Secure Boot variables
This item allows you to save all the Secure Boot keys to a USB storage device.