Windows 8 and 8.1 Forums

UEFI

  1. #21


    Posts : 879
    Windows 10


    Quote Originally Posted by Natalix View Post
    it said "on efi system windows can only be installed to gpt disks" and I can't click on next button.
    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 13:18.

      My System SpecsSystem Spec

  2. #22


    Posts : 4
    windows 8.1 x64


    Should I delete Samsung_rec and System partitions or only the one when I plan to install windows?
    During installation, I entered cmd, and converted disk to gpt and installed normally windows, is that ok? Because now, I can't enable UEFI in BIOS or otherwise my laptop starts to rebooting all the time, and won't go further then samsung logo screen.
      My System SpecsSystem Spec

  3. #23


    Posts : 879
    Windows 10


    @Natalix:

    If you select Legacy BIOS Boot Mode (not marked UEFI in the boot menu), Windows can only be installed to MBR disk.

    If you select UEFI Boot Mode (marked UEFI in the boot menu), Windows can only be installed to GPT disk.

    If you have already removed the OS partition, you can then delete all the partitions.

    Quote from this tutorial.

    Normally, you should be able to delete all the partitions on the Where do you want to install Windows? screen.

    Note: But if you cannot delete all the partitions on the Where do you want to install Windows? screen.

    - Boot the computer using the Windows 7/8/10 installation media.
    - On the first screen, press SHIFT+F10 to bring up the command prompt.
    - Run the following commands at the command prompt.

    diskpart
    list disk (this will give you a listing of the disks on your system)
    select disk # (select the disk you want to clean, for example select disk 0)
    clean (running the clean command will delete all partitions on the disk)
    exit

    Even if you are going to use the GPT (GUID Partition Table), you do not need to run the convert gpt command, since you are not creating the partitions at a command prompt.

    - Close the command prompt window and continue your Windows installation as usual.

    Click image for larger version
    Last edited by genet; 07 Nov 2015 at 11:19.
      My System SpecsSystem Spec

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