Windows 8 and 8.1 Forums


Do I need to disable secure boot to wipe hdd and install?

  1. #1

    Do I need to disable secure boot to wipe hdd and install?


    I have a hdd that has win 8 on it already. The motherboard is UEFI and it has secure boot.
    Do I need to disable secure boot, or could I run the installation, wipe everything off the hdd by partitioning during setup,and then install the OS without disabling secure boot?

      My System SpecsSystem Spec

  2. #2


    Posts : 2,690
    Windows 3.1 > Windows 10


    no need to disable secure boot
      My System SpecsSystem Spec

  3. #3


    Quote Originally Posted by KYHI View Post
    no need to disable secure boot
    Why is that? When downgrading win8 to win7 on another computer I had to do so.
      My System SpecsSystem Spec

  4. #4


    Posts : 879
    Windows 10


    Quote Originally Posted by strunberg View Post
    Quote Originally Posted by KYHI View Post
    no need to disable secure boot
    Why is that? When downgrading win8 to win7 on another computer I had to do so.
    If you have an OEM PC that came with Windows 8/8.1 64-bit preinstalled and you want to install Windows 7 64-bit, then you must disable Secure Boot, because Secure Boot is not compatible with Windows 7.

    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.
      My System SpecsSystem Spec

  5. #5


    If I were to convert my win7 install thumb drive into a UEFI win 7 install thumb drive, would it then be compatible with secure boot?
      My System SpecsSystem Spec

  6. #6


    Posts : 2,690
    Windows 3.1 > Windows 10


    The USB has to be formatted FAT32 to be able to boot your UEFI compatibly PC

    the setup media will contain two boot managers
    BOOTMGR = BIOS Boot Manager
    BOOTMGR.EFI = UEFI Boot Manager

    What are you wanting to do ??
    You have at first referenced windows 8 and now you just referenced windows 7
    You mentioned HDD and now USB

    Windows 7 does not support SecureBoot - so you have to disable it in the Bios
    Windows 8/8.1/10 support SecureBoot - so no need to disable to run setup...
      My System SpecsSystem Spec

  7. #7


    My real goal is to find a way to downgrade people's computers remotely over the internet. I'm wondering if there's a way to make the windows 7 installation media compatible with the newer UEFI motherboards, without requiring my clients going into the BIOS to disable secure boot.

    https://support.lenovo.com/us/en/documents/sf13-t0008
    To create UEFI bootable USB media that will launch an MDT deploy,
    MDT would enable me to downgrade over the internet.
      My System SpecsSystem Spec

Do I need to disable secure boot to wipe hdd and install?
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