Windows 8 and 8.1 Forums


Windows 7 - Windows 8 dual boot problem - 'W8 preinstalled

  1. #1


    Posts : 21
    Windows 7 / Windows 8

    Windows 7 - Windows 8 dual boot problem - 'W8 preinstalled


    I am using Samsung np550 laptop which came with Windows 8 preinstalled. I want to dual boot Windows 7 and Windows 8. So this is what I did:

    • In bios - disabled Fast boot
    • Then I disabled 'Secure boot'
    • Selected boot mode as 'CSM'


    Now I inserted Windows 7 DVD and it booted with it. The problem is when I'm trying to select a partition, it says that "Windows 7 cannot be installed in this partition. The selected partition is of GPT style".

    Please help me solve this problem, so that I can use both W8 and W7.

      My System SpecsSystem Spec

  2. #2


    Posts : 1,121
    Windows 8.1 x64


    You need to boot the DVD in UEFI mode. It should be listed in the Boot Device Menu as such along with a non-UEFI version...
      My System SpecsSystem Spec

  3. #3


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    Welcome to EightForums

    Downgrade to Windows 7.
    Downgrade Windows 8 to Windows 7
    Warning you must have the UEFI/BIOS firmware setting in Step Three set.

    Make sure you read the NOTE at Step three.
    Check your UEFI/BIOS firmware in Step three, If you use CSM Windows 8 will no boot.

    WARNING both OS need to be installed in UEFI mode to dual boot.
      My System SpecsSystem Spec

  4. #4


    Posts : 21
    Windows 7 / Windows 8


    Quote Originally Posted by Saltgrass View Post
    You need to boot the DVD in UEFI mode. It should be listed in the Boot Device Menu as such along with a non-UEFI version...
    If I'm selecting this, pc is directly booting to W8. Even in the bios, it says like - to boot into W7 choose CSM.
      My System SpecsSystem Spec

  5. #5


    Posts : 21
    Windows 7 / Windows 8


    Quote Originally Posted by theog View Post
    Welcome to EightForums

    Downgrade to Windows 7.
    Downgrade Windows 8 to Windows 7
    Warning you must have the UEFI/BIOS firmware setting in Step Three set.

    Make sure you read the NOTE at Step three.
    Check your UEFI/BIOS firmware in Step three, If you use CSM Windows 8 will no boot.

    WARNING both OS need to be installed in UEFI mode to dual boot.

    Thanks for the comment. I have seen this tutorial while googling abt my prob. Actually, my pc has some recovery partitions for W8. In the tutorial, it has been told to delete all partitions. This means I have to wipe the recovery partitions too, which if done, then I will lose all the W8 recovery data. Is it possible to keep them intact and then install W7?
      My System SpecsSystem Spec

  6. #6


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    On a Samsung you can dual boot 8&7 without deleting all partitions.

    Quote Originally Posted by theog
    Click image for larger version

    Click image for larger version

      My System SpecsSystem Spec

  7. #7


    Posts : 21
    Windows 7 / Windows 8


    Quote Originally Posted by theog View Post
    On a Samsung you can dual boot 8&7 without deleting all partitions.

    Quote Originally Posted by theog
    Click image for larger version

    Click image for larger version

    So it says to delete recovery partitions. This is my point actually - is there any way to install W7 without deleting them.? Please take a look on the below screenshot which shows partitions in my pc..
    Click image for larger version
      My System SpecsSystem Spec

  8. #8


    Posts : 5,592
    ME, XP,Vista,Win7,Win8,Win8.1


    What UEFI/BIOS firmware boot mode will you be using in CSM?
      My System SpecsSystem Spec

  9. #9


    Posts : 21
    Windows 7 / Windows 8


    Quote Originally Posted by theog View Post
    What UEFI/BIOS firmware boot mode will you be using in CSM?
    Sorry I'm not clear about this question...But all I did is this: Fast boot - disabled | Secure boot - disabled | boot mode - CSM

    in boot mode there are 3 options like - UEFI, CSM, 'UEFI & CSM'...

    Everything is ok. Windows 7 is also booting, but the prob is it shows that partition is in GPT style and I cannot install it..may be, I'll provide you a pic of that error in few mins..
      My System SpecsSystem Spec

  10. #10


    Posts : 21
    Windows 7 / Windows 8


    Here it is...sorry for the blurred pic..

    Click image for larger version
      My System SpecsSystem Spec

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Windows 7 - Windows 8 dual boot problem - 'W8 preinstalled
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