1.    23 Dec 2015 #1
    Join Date : Nov 2015
    Posts : 40
    windows 10

    Dual boot revisited


    HI

    In a previous post, with help from this forum, I successfully installed win10 64 bit (GPT partitioned drive) dual booting with win 10 32 bit on a separate drive (MBR partitioned). I want to change this to have both OS's on the same GPT drive. I created an additional partition on the GPT drive, booted from an EFI mode USB stick and ran the win10 32 bit install. The install failed right after I selected to install the 32 bit, with an error message referring to winload.efi being missing. I then selected the 64 bit install and that ran successfully.

    Why does the 32 bit install fail, while still being able to install the 64 bit windows? If I can I want to end up with 32 bit windows and 64 bit windows on the same GPT drive.

    Thanks.
      My ComputerSystem Spec
  2.    23 Dec 2015 #2
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,206
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    Your PC ships with a 64-bit EFI implementation. Such an EFI can boot only 64-bit OSes in EFI mode. Thus, to boot a 32-bit version of Windows, you must boot it in legacy BIOS mode.
      My ComputerSystem Spec
  3.    23 Dec 2015 #3
    Join Date : Nov 2015
    Posts : 40
    windows 10
    Thread Starter

    I guess this means I have to put the 32 bit windows on a separate MBR partitioned drive. There would be no way to have both OSs on the same GPT drive. Is that correct?
    Quote Originally Posted by topgundcp View Post
    Your PC ships with a 64-bit EFI implementation. Such an EFI can boot only 64-bit OSes in EFI mode. Thus, to boot a 32-bit version of Windows, you must boot it in legacy BIOS mode.
      My ComputerSystem Spec
  4.    23 Dec 2015 #4
    Join Date : Jul 2014
    San Jose, California
    Posts : 2,206
    Ubuntu14.04x64 MintMate17x64 Win10Prox64

    Quote Originally Posted by falkunmalti View Post
    I guess this means I have to put the 32 bit windows on a separate MBR partitioned drive. There would be no way to have both OSs on the same GPT drive. Is that correct?
    Correct.
      My ComputerSystem Spec
  5.    23 Dec 2015 #5
    Join Date : Nov 2015
    Posts : 40
    windows 10
    Thread Starter

    Thanks Topgundcp. I am marking this as solved. You have been very helpful. I am going to convert everything to BIOS Legacy. That way, my two OSs can be on the same SSD drive.

    Quote Originally Posted by topgundcp View Post
    Correct.
      My ComputerSystem Spec

 


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