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    Trouble dual booting Windows 10 with 8.1

    Discussion in 'Windows OS and Software' started by white_Shadoww, Oct 4, 2014.

  1. white_Shadoww

    white_Shadoww Newbie

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    I have a Sony Vaio Fit laptop. It is my main working (and only btw :p) laptop. So I thought I'd just dual boot Windows 10 with 8.1. So, I created a 40GB partition on my hard drive. I downloaded the x64 version of Windows 10 and burned it to a USB drive with Windows 7 DVD USB tool installer. I changed the BIOS settings such as boot from external drive 'enabled' and put that option on top of the list. Disabled the secure boot as well. And when I select boot from USB option, it says booting from external device failed, that is when the boot mode is selected as UEFI in BIOS settings. When I change it to Legacy mode, I'm able to get past the Install now screen and the choose upgrade or custom installation. But when I choose custom installation, and I'm allowed to choose a drive on which I want to install the preview and when I select the drive I have created, it says, Windows can't be installed because the selected disk is of GPT partition type, or something like this. What am I doing wrong? Please, someone help me out. Thanks.
     
    white_Shadoww, Oct 4, 2014
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  2. Dufus

    Dufus .

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    Format your USB drive as FAT32 then extract the files from the iso to your USB. Then boot the USB as UEFI.
     
    Dufus, Oct 4, 2014
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  3. Ethrem

    Ethrem Notebook Prophet

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    Download Rufus and use it to make a GPT for UEFI systems bootable drive and boot it in EFI mode. That's what I did and I have them running side by side (although I chose to use a VHD image for the install so I can easily remove it later).

    http://rufus.akeo.ie/

    Seriously amazing tool, I use it all the time.

    Sent from my HTC One_M8 using Tapatalk
     
    Ethrem, Oct 4, 2014
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    ellalan and Starlight5 like this.
  4. Dufus

    Dufus .

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    He already has a GPT partition.

    FAT32 is a native file system for (U)EFI, once the files are extracted from the iso to the USB FAT32 formatted drive the necessary EFI files under the sub folders will allow EFI booting.

    Using a VM is easier, just create a virtual HD that is big enough and mount the iso onto a virtual optical drive.
     
    Dufus, Oct 5, 2014
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  5. ellalan

    ellalan Notebook Deity

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    Yes, I used rufus as well, very fast and need no installation.
     
    ellalan, Oct 5, 2014
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  6. white_Shadoww

    white_Shadoww Newbie

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    Thanks guys. Worked with Rufus.
     
    white_Shadoww, Oct 5, 2014
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  7. Ethrem

    Ethrem Notebook Prophet

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    OP figured out what I was talking about.
    Glad to help, Prema turned me on to Rufus making a boot drive for his BIOS mod but it works so well I don't even use universal Linux installer anymore, Rufus is faster and you have more control.

    Sent from my HTC One_M8 using Tapatalk
     
    Ethrem, Oct 5, 2014
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    Dufus likes this.