How to make dual boot install windows 7 gbt problems.


  1. custard
    Posts : 2
    windows 8.1 64 bit
       New #1

    How to make dual boot install windows 7 gbt problems.


    I made a partition on harddisk with windows 8.1 already installed, followed the steps on bios to make my usb boot works... it worked the installation of windows 7 started but then i got the message it could not be installed to the disk because of GBT, i have no idea what it is... I used to have 3 systems installed in a other laptop(older) but now with Lenovo and windows 8.1 it seems very difficult to setup a dual boot, anyone could guide me or point me the steps or tutorial :) on how to install a windows 7 in this partition i created? I don't want delete or remove my factory installed windows 8.1 no, i just want to have two systems, a dual boot, is it possible?
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  3. gregrocker
    Posts : 50,642
       New #2

    Boot into bios set up to disable Secure Boot.

    Then boot the DVD as a UEFI device to try install to the target partition or space you created. UEFI (Unified Extensible Firmware Interface) - Install Windows 7 with

    If this fails we need to see pictures of the BIOS Settings choices for CSM, UEFI, Legacy BIOS.
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  4. genet
    Posts : 32
    Windows 8.1/10 x64
       New #3

    custard said:
    but then i got the message it could not be installed to the disk because of GBT
    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
    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.

    How to make dual boot install windows 7 gbt problems.-windows-cannot-installed-disk.-selected-disk-gpt-partition-style.png

    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.

    How to make dual boot install windows 7 gbt problems.-windows-cannot-installed-disk.-selected-disk-has-mbr-partition-table.png
    Last edited by genet; 13 Nov 2015 at 13:07.
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  6. custard
    Posts : 2
    windows 8.1 64 bit
    Thread Starter
       New #4

    Thanks i'm going now to try disable the Legacy BIOS mode, and i have another question which i'm abit confused, so if the windows 7 im trying to install(i'm using usb pendrive) is 64bit it will work with GPT? And how i can check if it is a windows 7 64 or 32? I don't remember what it is, and when the installation started i didn't see it does not say.
    __________________________________________
    I tried to enable UEFI Boot Mode instead of Legacy and i can't boot from the usb stick, when i go to BIOS to select from where to boot and have only 3 options, windows, UEFI AND UEFI i tried both they says not possible, and a ok button, so i clicked ok. Is there any other option? Why Lenovo turned it so hard to install some other system? It is frustating
    ______________________________________________
    Im not able to install either from usb either from cd, enabled the options above but it's not working. Seems its really difficult to make one installation, have to update the usb and what more... any more help? I'm kinda lost here
    Last edited by custard; 20 Jun 2015 at 14:49.
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  7. gregrocker
    Posts : 50,642
       New #5

    Flash stick must be formatted using Option One of UEFI Bootable USB Flash Drive - Create in Windows

    I didn't say to change any settings in bios yet except to disable Secure Boot. Please follow the steps I gave you exactly as written if you want my help.
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