Windows 8 and 8.1 Forums


On EFI systems, Windows can only be installed to GPT disks

  1. #1


    Posts : 178
    Win 8.1 Pro x64

    On EFI systems, Windows can only be installed to GPT disks


    Setting up a dual boot with Win 7x64 on a 120GB SSD. The partition for Win 8 has 48 GB, but the install is failing: "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." The first time I tried with the partition formatted, the second with it unallocated, both getting the same result. What am I missing? Thanks,

      My System SpecsSystem Spec

  2. #2

  3. #3


    Posts : 178
    Win 8.1 Pro x64


    Many thanks for your succinct reply. My Z68 board's splash screen says it's Hybrid EFI, but the only thing I found with EFI was the "EFI CD/DVD Boot Option." I set that to non-EFI, set the CD first, the SSD with Win 7 second, and rolled the dice. Win 8 installed right off. I never got to any of the last paragraph with the Diskpart Clean command.
      My System SpecsSystem Spec


  4. #4


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1
      My System SpecsSystem Spec

  5. #5


    Posts : 178
    Win 8.1 Pro x64


    Thanks for that. It's not for today, given the normal install last night (plus, I'd want to prepare a couple of backup images in case something went wrong). One question: Where does that first screen come up?
      My System SpecsSystem Spec

  6. #6


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


    After you use the one time boot menu.

    Click image for larger version
      My System SpecsSystem Spec

  7. #7


    Posts : 21
    WINDOWS 7 AND 8



    Can you go into more details of how to fix problems. I have the same problem like Highstream member and was not able to fix.

    My system is Lenovo H430 desktop. I was about to install with dual boot (windows 7 and 8), but Windows 8 was accidentally erased and I am unable to reinstall again.

    How can I tell if my system is UEFI?

    Thanks,
      My System SpecsSystem Spec

  8. #8


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


    Quote Originally Posted by TORO35 View Post

    Can you go into more details of how to fix problems. I have the same problem like Highstream member and was not able to fix.

    My system is Lenovo H430 desktop. I was about to install with dual boot (windows 7 and 8), but Windows 8 was accidentally erased and I am unable to reinstall again.

    How can I tell if my system is UEFI?

    Thanks,
    I take it, the Lenovo H430 desktop came with Windows 8 Preinstalled.

    Note   Note

    When dual booting with Windows 8 Preinstalled & Windows 7

    Follow Step one to five in this tutorial:
    Downgrade Windows 8 to Windows 7

    warning   Warning

    Before making the partition for Windows 7, delete the OEM Recovery partition at the end of HDD drive.
    If you shink C: before deleting the OEM Recovery partition, the C: & the new partition will be converted to Dynamic partitions.




    Than follow this tutorial: (installing in uEFI mode.)
    Dual Boot Installation - Windows 8 and Windows 7 or Vista

      My System SpecsSystem Spec

  9. #9


    Posts : 21
    WINDOWS 7 AND 8


    My Lenovo H430 came with windows 7 preinstalled. I upgraded to windows 8 for dual boot recently without any problem. then I accidentally deleted the windows 8 partition and i can can not reinstall due to the ( Setting up a dual boot with Win 7x64 on a 120GB SSD. The partition for Win 8 has 48 GB, but the install is failing: "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." The first time I tried with the partition formatted, the second with it unallocated, both getting the same result. What am I missing? Thanks)

    Any suggestion is greatly appreciated. My system only have one HDD.
      My System SpecsSystem Spec

  10. #10


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


    Try Cleaning the HD Drive, using Step one in this tutorial:
    SSD / HDD : Optimize for Windows Reinstallation - Windows 7 Forums
    Than type> convert gpt

    Click image for larger version
      My System SpecsSystem Spec

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On EFI systems, Windows can only be installed to GPT disks

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