Windows 10: Multi boot system question....adding Vista

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  1. Posts : 13,782
    Windows 10 Pro
       25 Jul 2017 #21

    Dude said: View Post
    Okay, thanks for testing it Kari
    I will continue testing it simply because theoretically there shouldn't be anything preventing Vista to boot from GPT disk on UEFI system.
      My ComputerSystem Spec

  2.    25 Jul 2017 #22

    I already have secure boot turned off since I have Linux installed and working using Easy BCD as a boot manager.
    Yes thanks guys for all the suggestions and testing. Just an idea to have several MS Windows versions bootable on the same machine!
    Already have VM with DOS, Windows 3.11, Windows 95. Windows 98 and Windows XP. Maybe the next step is to add Vista!
      My ComputerSystem Spec


  3. Posts : 11,697
    Windows 10 Pro X64
       25 Jul 2017 #23

    Kari said: View Post
    I will continue testing it simply because theoretically there shouldn't be anything preventing Vista to boot from GPT disk on UEFI system.
    @Kari what is considered a class 3 system?
    Windows support of UEFI
    The following Windows editions include support for UEFI:
    Windows 8.1 and Windows® 8 support native UEFI 2.0 or later on 32-bit (x86), 64-bit (x64), and ARM-based PCs. They also support BIOS-based PCs, and UEFI-based PCs running in legacy BIOS-compatibility mode.

    Some features such as Secure Boot require UEFI 2.3.1 Errata C or higher.

    Windows Server 2012 R2 and Windows Server® 2012 support native UEFI 2.0 or later on 64-bit systems. Some features such as Secure Boot require UEFI 2.3.1.

    Windows® 7, Windows Vista® with Service Pack 1 (SP1), Windows Server® 2008 R2 and Windows Server® 2008

    Support UEFI 2.0 or later on 64-bit systems. They also support BIOS-based PCs, and UEFI-based PCs running in legacy BIOS-compatibility mode.

    Support on Class 2 systems running in legacy BIOS-compatibility mode by using a CSM, so they can use the legacy BIOS INT10 features.

    Are not supported on Class 3 systems, because these operating systems assume the presence of legacy BIOS INT10 support in the firmware, which is not available in a Class-3 UEFI implementation.

    Windows Server® 2008 R2 and Windows Server® 2008 also support EFI 1.10 on Itanium-based systems.
    Source UEFI Firmware
      My ComputerSystem Spec


  4. Posts : 11,697
    Windows 10 Pro X64
       25 Jul 2017 #24

    warewasher2025 said: View Post
    I already have secure boot turned off since I have Linux installed and working using Easy BCD as a boot manager.
    Yes thanks guys for all the suggestions and testing. Just an idea to have several MS Windows versions bootable on the same machine!
    Already have VM with DOS, Windows 3.11, Windows 95. Windows 98 and Windows XP. Maybe the next step is to add Vista!
    That is an option, but if it can be done I have confidence Kari will figure it out
      My ComputerSystem Spec


  5. Posts : 13,782
    Windows 10 Pro
       25 Jul 2017 #25

    Dude said: View Post
    @Kari what is considered a class 3 system?
    Class 3 means that UEFI does not support CSM (compatibility support module), therefore there's no backwards compatibility. Vista & W7 cannot run on Class 3 UEFI, missing CSM means the machine can't handle legacy bootloaders required by Vista & W7.

    In my case, the test laptop is a bit older and has Class 2, so that shouldn't be an issue.
      My ComputerSystem Spec

  6.    25 Jul 2017 #26

    Must be just a crazy fluke that I got Windows 7 installed and running on this same machine.
      My ComputerSystem Spec


  7. Posts : 13,782
    Windows 10 Pro
       25 Jul 2017 #27

    warewasher2025 said: View Post
    Must be just a crazy fluke that I got Windows 7 installed and running on this same machine.
    I think it's rather that you have class 2.x UEFI, Seven and Vista do not have (should not have) any issues running from GPT disk on UEFI machines as long as UEFI is not class 3 or later.
      My ComputerSystem Spec


 
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