Windows 8 and 8.1 Forums


UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with

  1. #80


    Posts : 21,821
    64-bit Windows 10


    Hell BazzaG, and welcome to Eight Forums.

    Windows can only install to a MBR disk and not GPT. I'd recommend to clean and covert it back to MBR first.

    It is best to delete all partitions on the drive that you are installing Windows 8 on until the disk shows as unallocated space like in the tutorial instead. During the installation of Windows 8 with UEFI, the disk will then automatically setup like in the tutorial.

    Afterwards, see how it goes.

      My System SpecsSystem Spec

  2. #81


    Posts : 51
    Windows 8.1.1 PRO 64bit


    Brink,

    Thanks muchly for your reply, but now I'm more confused than before.

    My understanding that a Win8 installation in UEFI mode has 4 basic requirements:

    a) A UEFI enabled platform (the H87M-PRO is supposed to be UEFI enabled)
    b) A x64 Operating System that supports it (in my case Win8 Pro 64bit)
    c) Installing to GPT partitioned disk or RAID array that includes an "EFI System Partition" or ESP for short.
    d) Booting the installation media in UEFI mode (in my case retail Win8 Pro 64bit DVD)

    Several posts on this forum indicate that Win8 can be installed onto a HDD in GPT mode, such as, http://www.eightforums.com/newreply....reply&p=154769

    GPT mode doesn't seem to be a issue in itself. That is, I can leave the SSD in GPT mode, boot from the windows install DVD in non-UEFI mode, select custom install, new & I always end up with 2 partitions not 4 as shown in numerous screen shots. Cancelling the install at this point & going back to the "Install Windows" screen, hitting shift-F10, DISKPART, clean, convert mbr ... I get a error msg that the SSD is already in MBR mode!!!

    Trying again ...

    Cleaned SSD in MBR mode (at least according to DISKPART it is), from the BIOS BOOT screen select "UEFI: P4 ATAPI ..." -- Failed.

    Cleaned SSD in GPT mode (at least according to DISKPART it is), from the BIOS BOOT screen select "UEFI: P4 ATAPI ..." -- Failed.

    My problem is that the Win8 Pro installer refuses to run if I select the "UEFI" DVD device. I don't get to see the Win8 "window" icon, I don't get to the "Install Windows" screen, just simply straight back to the BIOS screen.

    I can & have previously installed Win8 on this PC in non-UEFI (ie. by booting from the "P4 ATAPI ..." device) ... could this make a difference?

    BazzaG
      My System SpecsSystem Spec

  3. #82


    Posts : 21,821
    64-bit Windows 10


    The partitions are created during the installation of Windows 8 after you select the "unallocated" disk, and click Next.

    Do you have the DVD selected as the first boot device, and the hard drive as the second boot device in your boot priority order in BIOS/UEFI settings?

    You might also see how it works with an UEFI USB instead.
      My System SpecsSystem Spec

  4. #83


    Posts : 51
    Windows 8.1.1 PRO 64bit


    Quote Originally Posted by Brink View Post
    The partitions are created during the installation of Windows 8 after you select the "unallocated" disk, and click Next.
    Yep & every time I've gotten this far only 2 partitions are allocated.

    Do you have the DVD selected as the first boot device, and the hard drive as the second boot device in your boot priority order in BIOS/UEFI settings?
    Yes I do. As with other BIOS options I have tried several different boot priorities:

    1. UEFI: P4 ATAPI
    2. P4 ATAPI
    3. P1 Samsung
    4. Disabled

    and

    1. UEFI: P4 ATAPI
    2. P1 Samsung
    3. P4 ATAPI
    4. Disabled

    For both of the above, it tries the UEFI 1st, fails, moves on to the next, eventually the P4 ATAPI is selected and windows will install OK using MBR.

    I've also tried:

    1. UEFI: P4 ATAPI
    2. P1: Samsung
    3. Disabled
    4. Disabled

    One again it tries the UEFI, fails and then the Samsung. Because there's nothing on the Samsung I then get another msg ... something like ... no valid sfw to run, press CNTL-ALT-DEL to restart the PC.

    You might also see how it works with an UEFI USB instead.
    Yep that's a option, unfortunately I will have to buy a USB stick big enough ... I normally use a portable 2.5" drive as my "USB" drive.

    BazzaG...
      My System SpecsSystem Spec


  5. #84


    Posts : 2
    Windows 8 Pro


    I've installed Win 8 Pro with UEFI with what I think is the correct way.

    My only concern is that in my BIOS mode, gigabyte Z77X-UD3H, the HDD that I installed Win 8 on doesn't have the "UEFI:" prefix on it in the boot priority, whereas my old HDD that I had installed Win 8 on it has the "UEFI:" prefix on it.

    Consequently to boot the Win 8 on my new HDD, no other HDD connected, I have to select Windows Boot Manager to load Win 8, if I select the actual HDD as the #1 boot priority I get the "reboot and select proper boot device or insert boot media."

    Last thing, if I go into msinfo32 after I've loaded up Win 8 by the Boot Manager, under BIOS Mode it says "UEFI." So my question is did I do everything right and with UEFI you just have to use Windows Boot Manager as your #1 boot priority?
      My System SpecsSystem Spec

  6. #85


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    Quote Originally Posted by Smithistory View Post
    I've installed Win 8 Pro with UEFI with what I think is the correct way.

    My only concern is that in my BIOS mode, gigabyte Z77X-UD3H, the HDD that I installed Win 8 on doesn't have the "UEFI:" prefix on it in the boot priority, whereas my old HDD that I had installed Win 8 on it has the "UEFI:" prefix on it.

    Consequently to boot the Win 8 on my new HDD, no other HDD connected, I have to select Windows Boot Manager to load Win 8, if I select the actual HDD as the #1 boot priority I get the "reboot and select proper boot device or insert boot media."

    Last thing, if I go into msinfo32 after I've loaded up Win 8 by the Boot Manager, under BIOS Mode it says "UEFI." So my question is did I do everything right and with UEFI you just have to use Windows Boot Manager as your #1 boot priority?
    With UEFI, Windows Boot Manager should always be first boot device.
      My System SpecsSystem Spec

  7. #86


    Posts : 21,821
    64-bit Windows 10


    Hello Smithistory, and welcome to Eight Forums.

    If your Disk Management looks like this below for your Windows drive with an EFI partition, then you are good to go and are using a GPT disk for UEFI.

    You can also use this to verify UEFI: BIOS Mode - See if Windows Boot in UEFI or Legacy Mode


    Click image for larger version

    Hope this helps,
    Shawn
      My System SpecsSystem Spec

  8. #87


    Posts : 2
    Windows 8 Pro


    Many thanks theog and Brink. I was going crazy and searching all over wondering if I did everything correctly, especially since the 10yr old HDD I originally installed Win 8 on had the "UEFI:" prefix on it and the new HDD I just installed Win 8 on did not have the "UEFI:" prefix on it in the boot selector.
      My System SpecsSystem Spec

  9. #88


    Posts : 21,821
    64-bit Windows 10


    Glad we could help.
      My System SpecsSystem Spec

  10. #89


    But the next button does not work and said windows can't be installed on drive 0
      My System SpecsSystem Spec

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UEFI (Unified Extensible Firmware Interface) - Install Windows 8 with

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