Windows will not install on my HDD - what does this message mean?


  1. AaLF
    Posts : 488
    Microsoft Windows 7 HomePremium 64-bit 7601 Multiprocessor Free Service Pack 1
       New #1

    Windows will not install on my HDD - what does this message mean?


    Windows 7 doesn't like the HDD I formatted. How do I fix it?
    The elected disk has an MBR partition table. On EFI systems windows can only be installed on GPT disks.
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  3. Slartybart
    Posts : 6,458
    x64 (6.3.9600) Win8.1 Pro & soon dual boot x64 (6.1.7601) Win7_SP1 HomePrem
       New #2

    See if anything here helps: https://www.sevenforums.com/installation-setup/223604-cant-do-fresh-install-windows-7-64-bit-mbr-part-table.html
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  4. AaLF
    Posts : 488
    Microsoft Windows 7 HomePremium 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       New #3

    I'm not getting an option to create an MBR disk - see ic
    Attached Thumbnails Attached Thumbnails Windows will not install on my HDD - what does this message mean?-mbr.png  
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  6. theog
    Posts : 11,408
    ME/XP/Vista/Win7
       New #4

    As the new MOBO's now have a uEFI/BIOS firmware.
    How to install Windows 64 bit on a uEFI/BIOS firmware:
    UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with

    Partitioning when installing.

    Windows will not install on my HDD - what does this message mean?-windows-8-downgrade-008-sb-1.png

    Windows will not install on my HDD - what does this message mean?-windows-8-downgrade-012-sb.png


    For more info on uEFI:
    Windows and GPT FAQ
    Unified Extensible Firmware Interface - Wikipedia, the free encyclopedia
    UEFI Firmware
    Technical Note: UEFI BIOS vs. Legacy BIOS, Advantech(EN) - YouTube
    Sample: Configure UEFI/GPT-Based Hard Drive Partitions by Using Windows PE and DiskPart
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  7. AaLF
    Posts : 488
    Microsoft Windows 7 HomePremium 64-bit 7601 Multiprocessor Free Service Pack 1
    Thread Starter
       New #5

    I'm trying to do this tip from that list above:
    See if you have the option to deselect EFI Boot disk in BIOS Boot order so that you can install to an MBR HD.
    BiOS offers this:
    EFI and LEGACY
    LEGACY ONLY
    EFI ONLY

    Which one to install an MBR HD?
    (N.B. I think its set to EFI and LEGACY and not accepting HD.)
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  8. Pauly
    Posts : 2,573
    Win7 Ultimate X64
       New #6

    Selecting legacy should allow installation
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  10. Slartybart
    Posts : 6,458
    x64 (6.3.9600) Win8.1 Pro & soon dual boot x64 (6.1.7601) Win7_SP1 HomePrem
       New #7

    You're probably better off following theog suggestion in post #4. Your board supports UEFI, why not go with that instead of a LEGACY BIOS.

    I know... I pointed you towards the other thread, but theog found what I thought might be in there and provided a direct link.
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  11. Slartybart
    Posts : 6,458
    x64 (6.3.9600) Win8.1 Pro & soon dual boot x64 (6.1.7601) Win7_SP1 HomePrem
       New #8

    Just a heads up - you should have one only drive online when installing winodws 7. Should is perhaps a strong word - it makes it easier to define your disk configuration.
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  12. gregrocker
    Posts : 50,642
       New #9

    The drive says it's Basic in Disk Mgmt, so it needs to be converted using Convert MBR Disk to GPT Disk - Windows 7 Forums from Disk Mgmt make sure Legacy + UEFI remains set in BIOS then it should let you create your partitions. Always unplug all other drives in Disk Mgmt to avoid other problems.

    The other way to do this from the UEFI booted installer is to delete all partitions before install which should remove the Basic formatting and commence install in UEFI mode since that's the way you booted in the installer as shown in UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with - Windows 7 Forums.

    To decide whether you want UEFI for sure you can learn more watching this video comparing UEFI BIOS vs. Legacy BIOS - YouTube.

    If you decide you don't want UEFI then here's how to Bypass UEFI to Install WIn7
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