Windows 8 and 8.1 Forums


Secure Boot and Windows 8 Activation

  1. #1


    UK
    Posts : 275
    Windows 8.1 64 bit

    Secure Boot and Windows 8 Activation


    I'm just about to experiment setting up Secure Boot on my Gigabye GA-Z77X-UD5H motherboard running Windows 8 Pro Media Centre edition 64bit. Do I need to reactivate Windows 8 if I enable the secure boot settings in the BIOS? Does it matter whther secure boot is enabled when upgrading to Windows 8.1?

      My System SpecsSystem Spec

  2. #2


    Forever West
    Posts : 591
    WinVista, Win7, Win8.1, Win10, Mac OS X 10.10, Linux Mint 17.1


    First question, probably not, haven't changed the hardware.
    Second question, No, just have to be able to access the Store to get the download and install.
      My System SpecsSystem Spec

  3. #3


    Posts : 879
    Windows 10


    Tip   Tip
    If you are installing Windows 8/10 from a USB flash drive in UEFI Boot Mode, then you need to have a UEFI Boot Mode compatible Windows 8/10 USB flash drive.

    Here is more info: UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style). -> link


    Note: Windows 8/10 64-bit installation media is compatible with UEFI Secure Boot enabled.

    Gigabyte motherboard with UEFI firmware. How to install Windows 8/10 64-bit in UEFI Boot Mode.

    Select the following settings (marked with red color) in the Gigabyte UEFI firmware, if you want to install Windows 8/10 64-bit in UEFI Boot Mode.

    Windows 8/10 Features
    Allows you to select the operating system to be installed.
    - Other OS (Default)
    - Windows 8/10
    - Windows 8/10 WHQL

    CSM Support
    Enables or disables UEFI CSM (Compatibility Support Module) to support a legacy PC boot process.
    - Enabled - Enables UEFI CSM. (Default)
    - Disabled - Disables UEFI CSM and supports UEFI BIOS boot process only.
    This item is configurable only when Windows 8/10 Features is set to Windows 8/10 or Windows 8/10 WHQL.

    LAN PXE Boot Option ROM
    Allows you to select whether to enable the legacy option ROM for the LAN controller. (Default: Disabled)
    This item is configurable only when CSM Support is set to Enabled.

    Storage Boot Option Control
    Allows you to select whether to enable the UEFI or legacy option ROM for the storage device controller.
    - Disabled - Disables option ROM.
    - UEFI Only - Enables UEFI option ROM only.
    - Legacy Only - Enables legacy option ROM only. (Default)
    This item is configurable only when CSM Support is set to Enabled.

    Other PCI Device ROM Priority
    Allows you to select whether to enable the UEFI or Legacy option ROM for the PCI device controller other than the LAN, storage device, and graphics controllers.
    - Disabled - Disables option ROM.
    - UEFI Only - Enables UEFI option ROM only. (Default)
    - Legacy Only - Enables legacy option ROM only.
    This item is configurable only when CSM Support is set to Enabled.

    Network Stack
    Disables or enables booting from the network to install a GPT format OS, such as installing the OS from the Windows Deployment Services server. (Default: Disabled)

    Secure Boot
    Enables or disables Secure Boot function.
    - Enabled - Enables Secure Boot.
    - Disabled - Disables Secure Boot.
    This item is configurable only when Windows 8/10 Features is set to Windows 8/10 or Windows 8/10 WHQL.

    Secure Boot Mode
    Define the Secure Boot mode.
    - Standard
    - Custom
    This item is configurable only when Windows 8/10 Features is set to Windows 8/10 or Windows 8/10 WHQL.

    Click image for larger version

    Note: You do not need to change the boot order of drives in your UEFI firmware settings.
    - Connect your Windows 8/10 64-bit USB flash drive (Note: FAT32 file system) or insert your Windows 8/10 64-bit DVD.
    - Restart the computer.
    - Press the correct key to enter the boot menu (for example, Asus F8 and Gigabyte F12).
    - Select to boot from the "UEFI: USB/DVD device name".

    After the Windows 8/10 64-bit installation is completed, you can check if Secure Boot option is enabled in the UEFI firmware. Run the following command as administrator from the command prompt.

    powershell confirm-SecureBootUEFI

    The result should be True.

    Microsoft designed Secure Boot to protect the computer from low-level exploits and rootkits and bootloaders. A security process shared between the operating system and Unified Extensible Firmware Interface (UEFI, replacing the BIOS), Secure Boot requires all the applications that are running during the booting process to be pre-signed with valid digital certificates. This way, the system knows all the files being loaded before Windows 8/10 loads and gets to the login screen have not been tampered with.

    If a bootloader has infected your computer and it tries to load during the boot-up sequence, Secure Boot will be able to undo all the changes and thwart the attack. Having Secure Boot means it is that much harder for attackers to try to compromise the start up sequence.
    Last edited by genet; 10 Nov 2015 at 04:20.
      My System SpecsSystem Spec

  4. #4


    UK
    Posts : 275
    Windows 8.1 64 bit


    Thanks. I've enabled Secure Boot as described above and all works fine!
      My System SpecsSystem Spec

  5. #5


    Posts : 1
    Windows 10 pro


    Did not work on my Gigabyte Z97-D3H.
    Had to set Secure boot mode on Custum and Enable key management.
    After recovery powershell confirm-SecureBootUEFI UEFI Firmware Settings - Boot to from inside Windows 10 - Windows 10 Forumsresulted is true. See
    Click image for larger versionClick image for larger version
      My System SpecsSystem Spec

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