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Thread: Windows 8.1 installation help!

  1. #1
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    Exclamation Windows 8.1 installation help!

    ok so I want to install Windows 8.1 from a bootable usb on a laptop.(ASUS X555L). This laptop currently runs win 8.1 as well with legacy BIOS(bios mode is legacy in SYSTEM INFORMATION). I checked the hdd and its mbr partion table(no efi systems shown in the disk management section). So I boot from usb and it doesnt allow me to install Windows in the drive with the following error message
    - "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"
    How is it an efi system if it shows legacy bios.
    Whats the problem here? Need your advice.
    TIA

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    I think u selected efi usb mode from boot. if not, then backup ur files, use diskpart to clear and create partition and install.

    - - - Updated - - -

    if ur usb boot drive apable of both efi or legacy boot - it will show 2 boot option with usb in boot screen.

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    Same problem here. Solution needed.

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    The bootable USB was made using GPT/EFI. Make one that has support for Legacy/MBR, or both.

    Click image for larger version. 

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    Last edited by Fox Mulder; May 29th, 2015 at 00:35.

  5. #5
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    Thanks for your replies @Fox Mulder and @fahimspider
    Solved it by changing partition to gpt using diskpart.
    I used the "MBR for bios and uefi at first" but it didt work. For some reason my bios always booted with uefi.The new asus bios is really confusing. I tried changing it to legacy. There were options about csm, tried it all but it still booted into uefi. So had no other options other than partitioning.

    @Overlord if your hdd have mbr partition then you have to select legacy bios in BIOS MENU. Otherwise your bios will boot with UEFI and you will need a GPT partitioned hdd, in that case you can convert mbr partion into GPT using diskpart in cmd.

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