Windows 8 and 8.1 Forums


Unable to boot dual os in win 8.1

  1. #1


    Posts : 8
    windows 8.1 single language x64

    Unable to boot dual os in win 8.1


    I've been using lenovo y50-70 laptop for some time with pre installed windows 8.1 in it.due to my project compatibility i need windows 7 os to support some software . i tried to dual boot in my laptop when i tried to install windows 7.it says"windows cannot be installed in this disk due to GPT partition " .
    i've tried to install the os in separate partition only.ive also tried every method such as cmd ,partition master too .now icouldnt able to install os help me

      My System SpecsSystem Spec

  2. #2


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    It is because the Windows 7 version that you have can only be installed in an MBR style partition, not GPT. How about installing it as a virtual machine with VmPlayer.

    VMware Player - Install Windows 8
      My System SpecsSystem Spec

  3. #3


    Posts : 8
    windows 8.1 single language x64


    Quote Originally Posted by topgundcp View Post
    It is because the Windows 7 version that you have can only be installed in an MBR style partition, not GPT. How about installing it as a virtual machine with VmPlayer.

    VMware Player - Install Windows 8

    ive tried to run my project in vmware it too slow to process the data's
    so only way is to dual boot os
      My System SpecsSystem Spec

  4. #4


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    Since it is a Laptop. The easiest way for dual boot 7 & 8 is to re-install 8 using MBR style partition then you can install 7. For desktop it is easier, most BIOS support both UEFI&MBR installation but you have to install in another HD with MBR partition style.
      My System SpecsSystem Spec

  5. #5


    Posts : 8
    windows 8.1 single language x64


    Quote Originally Posted by topgundcp View Post
    Since it is a Laptop. The easiest way for dual boot 7 & 8 is to re-install 8 using MBR style partition then you can install 7. For desktop it is easier, most BIOS support both UEFI&MBR installation but you have to install in another HD with MBR partition style.
    there is no space to install new drive with mbr partition style
      My System SpecsSystem Spec

  6. #6


    Germany/Florida
    Posts : 4,514
    Vista and Win7


    Try to delete UEFI: Disable UEFI Secure Boot Windows 8.1 - AvoidErrors . But make an image first in case something happens.

    And I don't understand your VMware Player performance problem. I run 6 systems under VMware Player and from an external SSD. Performance has never been a problem.
      My System SpecsSystem Spec

  7. #7


    Posts : 8
    windows 8.1 single language x64


    Quote Originally Posted by topgundcp View Post
    Since it is a Laptop. The easiest way for dual boot 7 & 8 is to re-install 8 using MBR style partition then you can install 7. For desktop it is easier, most BIOS support both UEFI&MBR installation but you have to install in another HD with MBR partition style.
    i'm using Lenovo Y 50-70 UHD series Laptop
    there is no extra compartment space to install new drive in the laptop
      My System SpecsSystem Spec

  8. #8


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    Quote Originally Posted by skyemaverick View Post
    Quote Originally Posted by topgundcp View Post
    Since it is a Laptop. The easiest way for dual boot 7 & 8 is to re-install 8 using MBR style partition then you can install 7. For desktop it is easier, most BIOS support both UEFI&MBR installation but you have to install in another HD with MBR partition style.
    i'm using Lenovo Y 50-70 UHD series Laptop
    there is no extra compartment space to install new drive in the laptop
    That's why I think it is easier to re-install Windows 8.1 using MBR style. You can download Windows 8.1 ISO from this link:
    Create installation media for Windows 8.1 - Windows Help
    And select your version of Windows as shown below and put it in a USB stick using: Rufus - Create bootable USB :
    Click image for larger version

    The product Key is embeded in the Laptop BIOS and will activate Windows during the installation.
    NOTE: Make sure you set your BIOS to Legacy MBR. and as suggested above, make a backup image of your current system first using: Macrium Reflect Free
      My System SpecsSystem Spec

  9. #9


    Posts : 8
    windows 8.1 single language x64


    Quote Originally Posted by topgundcp View Post
    Quote Originally Posted by skyemaverick View Post
    Quote Originally Posted by topgundcp View Post
    Since it is a Laptop. The easiest way for dual boot 7 & 8 is to re-install 8 using MBR style partition then you can install 7. For desktop it is easier, most BIOS support both UEFI&MBR installation but you have to install in another HD with MBR partition style.
    i'm using Lenovo Y 50-70 UHD series Laptop
    there is no extra compartment space to install new drive in the laptop
    That's why I think it is easier to re-install Windows 8.1 using MBR style. You can download Windows 8.1 ISO from this link:
    Create installation media for Windows 8.1 - Windows Help
    And select your version of Windows as shown below and put it in a USB stick using: Rufus - Create bootable USB :
    Click image for larger version

    The product Key is embeded in the Laptop BIOS and will activate Windows during the installation.
    NOTE: Make sure you set your BIOS to Legacy MBR. and as suggested above, make a backup image of your current system first using: Macrium Reflect Free
    how to set my BIOS to legacy MBR

    how to get my os product key.
    after formatting can i reinstall the backup os too
      My System SpecsSystem Spec

  10. #10


    Posts : 879
    Windows 10


    Quote Originally Posted by skyemaverick View Post
    i tried to dual boot in my laptop when i tried to install windows 7. it says "windows cannot be installed in this disk due to GPT partition " .
    Boot from the Windows installation media in UEFI Boot Mode, so you can use GPT (GUID Partition Table).

    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 13:28.
      My System SpecsSystem Spec

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