Windows 8 and 8.1 Forums


Dual Booting Pre-installed Windows 8.1 and Windows 7

  1. #1


    Posts : 1
    Windows 8.1 Pro

    Dual Booting Pre-installed Windows 8.1 and Windows 7


    Hello, today I am trying to dual boot my Pre-Installed Windows 8.1 Pro with Windows 7. I have chosen "Shrink Volume" in Disk Management and I have created a new partition for Windows 7. Whenever I try to install windows 7 on the selected partition, I get the error that the hard disk is GPT type. I cannot convert it to MBR.
    I open DISKPART
    I write LISTDISK
    I only see "Disk 0"
    I write "select Disk 0"
    Then I write "List Partition"
    My hard drive has 7 partitions. My windows 7 partition is 5
    I write "select partition 5"
    Now, my question is, if I write clean, will it clean that specific partition or my entire hard drive?

      My System SpecsSystem Spec

  2. #2


    Posts : 879
    Windows 10


    Quote Originally Posted by armenh7 View Post
    Whenever I try to install windows 7 on the selected partition, I get the error that the hard disk is GPT type.
    Boot from the Windows installation media in UEFI Boot Mode, so you can use GPT (GUID Partition Table).

    Quote from this post: UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style). -> link

    Tip   Tip
    Error message when you boot from the Windows installation media in Legacy BIOS Boot Mode:

    Windows cannot be installed to this disk. The selected disk is of the GPT partition style. (see screenshot below)

    That is because Windows can only be installed to MBR disk in Legacy BIOS Boot Mode, but you plan to install Windows on a GPT disk.

    - Boot from the Windows installation media in UEFI Boot Mode, so you can use GPT (GUID Partition Table).
    - But if you want to use MBR (Master Boot Record) partition table, then delete all partitions on the disk.

    Click image for larger version

    Error message when you boot from the Windows installation media in UEFI Boot Mode:

    Windows cannot be installed to this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks. (see screenshot below)

    That is because Windows can only be installed to GPT disk in UEFI Boot Mode, but you plan to install Windows on an MBR disk.

    - Delete all partitions on the disk, so you can use GPT (GUID Partition Table).
    - But if you want to use MBR (Master Boot Record) partition table, then boot from the Windows installation media in Legacy BIOS Boot Mode.

    Click image for larger version
    Last edited by genet; 13 Nov 2015 at 13:13.
      My System SpecsSystem Spec

Dual Booting Pre-installed Windows 8.1 and Windows 7
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