Windows 8 and 8.1 Forums

Dual booting help.

  1. #1


    Posts : 6
    Windows 8.1 x64

    Dual booting help.


    So I'm currently running Windows 8.1 64 bit on an SSD. I need to run a 32 bit OS whether it be windows 7 or 8. The drive I plan on installing it on is a 1tb hdd with two 500gb partitions. I want to use one of them.

    I have put windows 7 32 bit onto a USB drive and was able to boot into it while bios was set to legacy mode. But when I went to select the partition to install it on it says they are all gpt partitions and cannot install. So I booted back into windows 8 and tried to convert them to another partition type but got some error.
    Next with bootable USB drive with windows 8 32 bit I've tried using the official windows media drive tool and I was unable to boot into the drive for unknown reasons, boot mode was uefi, tried turning safe boot off, nothing seemed to work, also tried downloading an ISO burning it with several different USB installers none worked, I have tried using a different USB port too. I was able to get some ios I downloaded suggested by another to boot but when installation checks began it said ISO file was corrupt. Formatted and reburned it onto drive several times and get same issue. I have spent many hours for the past week trying to get this to work, any help will be greatly appreciates as I've hot a dead end.

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  2. #2


    Posts : 879
    Windows 10


    Quote Originally Posted by Xinute View Post
    I have put windows 7 32 bit onto a USB drive and was able to boot into it while bios was set to legacy mode. But when I went to select the partition to install it on it says they are all gpt partitions and cannot install.
    Quote from this post: UEFI Boot Mode (installing using the GPT partition style) and Legacy BIOS Boot Mode (installing using the MBR partition style). -> link

    Tip   Tip
    Error message when you boot from the Windows installation media in Legacy BIOS Boot Mode:

    Windows cannot be installed to this disk. The selected disk is of the GPT partition style. (see screenshot below)

    That is because Windows can only be installed to MBR disk in Legacy BIOS Boot Mode, but you plan to install Windows on a GPT disk.

    - Boot from the Windows installation media in UEFI Boot Mode, so you can use GPT (GUID Partition Table).
    - But if you want to use MBR (Master Boot Record) partition table, then delete all partitions on the disk.

    Click image for larger version

    Error message when you boot from the Windows installation media in UEFI Boot Mode:

    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. (see screenshot below)

    That is because Windows can only be installed to GPT disk in UEFI Boot Mode, but you plan to install Windows on an MBR disk.

    - Delete all partitions on the disk, so you can use GPT (GUID Partition Table).
    - But if you want to use MBR (Master Boot Record) partition table, then boot from the Windows installation media in Legacy BIOS Boot Mode.

    Click image for larger version
    Last edited by genet; 13 Nov 2015 at 13:29.
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  3. #3


    Posts : 6
    Windows 8.1 x64


    Quote Originally Posted by genet View Post
    Quote Originally Posted by Xinute View Post
    I have put windows 7 32 bit onto a USB drive and was able to boot into it while bios was set to legacy mode. But when I went to select the partition to install it on it says they are all gpt partitions and cannot install.
    On the Where do you want to install Windows? screen, you'll need to delete all of the partitions. Select a partition and click on the "Delete" option for each partition.

    Quote from this post:

    Error message when you boot in Legacy BIOS Boot Mode: Windows cannot be installed to this disk. The selected disk is of the GPT partition style.

    I don't want to deleted all partitions, one drive has windows 8 installed on it which id like to keep, hence dual boot, the other has data which stores games, documents ect. I created a partition on the second drive tho is there a way to change the partition without deleting data on other patitions on the same drive.
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  4. #4


    Posts : 2,690
    Windows 3.1 > Windows 10


    you are looking to dual boot hard drives.. Disk O and Disk 1

    the disk with windows 8 is UEFI-GPT and since you booted the media via legacy (BIOS) - you got a disk error

    X86 does not support UEFI so you would have to configure the machine for Legacy boot to install X86 versions of Windows.

    Your only options are to install windows 8 x64 in legacy mode or install win 7 x64

    Installing Windows 7 on UEFI based computer - Ask the Core Team - Site Home - TechNet Blogs

    Here is a very good option> VMware Player - Install Windows 8

    It allows you to host other OS's within your present OS ( x86 x64x win 7 8 9 10) there is a good video and it is REALLY easy to get setup and going
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  5. #5


    I second the VMware Player option - it is the way to go.
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  6. #6


    Posts : 6
    Windows 8.1 x64


    VM wont work for what i intend to use it for.
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  7. #7


    Germany/Florida
    Posts : 4,514
    Vista and Win7


    Question - why do you need a 32bit OS in the first place. I hope it is not for running 16bit programs because that won't work either way.

    Else, VMware Player is a very good option. Have a look here how that would work.

    Windows 7 and 8 side by side - YouTube

    And here is a tutorial on how to set it up.
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  8. #8


    Posts : 6
    Windows 8.1 x64


    VM isn't an option...
    I did just manage to boot into windows 7 32 bit setup. get error 0x80300024
    After reading around it looks like the solution is to remove the other drive. I'm using a laptop and to do that i would have to break the warranty seal. Is there any other way to do this in bios or something.
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  9. #9


    Posts : 2,690
    Windows 3.1 > Windows 10


    yes, reinstall windows 8 in legacy BIOS mode..

    or Install windows 7 x64 in UEFI mode..

    So I'm currently running Windows 8.1 64 bit on an SSD. I need to run a 32 bit OS whether it be windows 7 or 8. The drive I plan on installing it on is a 1tb hdd with two 500gb partitions. I want to use one of them.
    your gonna break the seal anyway..

    Right NOW you only have one SSD and no HDD correct??
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  10. #10


    Why won't VMware d what you want it to do? I run Windows XP in 32 bit mode in VMware and use the USB port to talk to my wifes sewing machine...it is pretty handy.
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