Booting Windows 7 in UEFI, GPT and Secure Boot mode aside W10.


  1. Vedita BR
    Posts : 3
    Windows 7 Ultimate SP1 32bit
       New #1

    Booting Windows 7 in UEFI, GPT and Secure Boot mode aside W10.


    Hello.
    I have slipstreamed a install.wim of Window 7 Enterprise x64 with updates language pack and necessary drivers. That was done within Windows 10, and withe ImageX i applied the install.wim to my D:\ Drive and i ran
    Code:
    cdboot D:\Windows
    to add windows 7 to the boot list. However, Windows 7 cant boot, it shows an error saying that
    Code:
    \Windows\system\winload.efi couldnt have the file signature verified "0x000428".
    What can I do? I dont want to mess with my GPT partitions, as i want keep them OEM as long as possible...
      My Computer
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  3. SIW2
    Posts : 16,161
    7 X64
       New #2

    Did you turn secure boot off?
      My Computers
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  4. Megahertz07
    Posts : 7,351
    Windows 7 HP 64
       New #3

    Win 7 isn't compatible with secure boot. On BIOS, turn it off.
    For the installation also turn Fast boot off.

    To install Win 7 on a EFI-GPT disk you must boot the Win 7 installation disk as UEFI.
    The installation disk must have \efi\boot\bootx64.efi

    EFI file
      My Computers
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