downgrade win8 to win7 with efi

Discussion in 'Windows 7' started by marcopolo437, Jan 1, 2013.

  1. marcopolo437

    marcopolo437 MDL Novice

    May 28, 2012
    hi evrybody
    i have paid for a asus g75vx with win8
    i want to downgrade with win7u
    i made the partition mbr but i cant install win7 because install tell me it cant install it with mbr with gp partition because of efi !
    can u help me plz ?
  2. tnx

    tnx MDL Expert

    Sep 2, 2008
    How were you trying to install Windows 7 ?
    From a disc or USB ?
    You have to install from a UEFI USB to install on GPT. Plus you need an extra file on the USB and to alter the file structure slightly.

    "disc root\efi\microsoft\boot" Folder elevated to "disc root\efi\boot"

    "bootmgfw.efi" file renamed to "BOOTX64.efi"

    "BOOTX64.efi" file copied into "disc root\efi\boot"

    Windows 8 is allready like this. Windows 7 has to be amended.

    If trying to install from a disc you will have to enter the dos cmd and convert the drive to MBR from GPT. Or install Windows 7 onto another drive. Conect the initial drive upto that an convert from GPT to MBR via disk management..Bit long winded any way really..

    Hope this makes sence....