Windows 8 and 8.1 Forums


Win 7 and Win 8 - Dual Boot Prob.

  1. #1


    Posts : 4
    Win 7 Ulitmate and Win 8 Pro

    Win 7 and Win 8 - Dual Boot Prob.


    I'm having some problems with dual-booting Windows 8 and Windows 7. I have Windows 7 installed on drive 0, and I just installed Windows 8 on drive 1. (Both SSDs, if that matters)

    After installing Windows 8, no dual-boot menu came up - it went straight into Windows 8. So then, using EasyBCD 2.2, I added a Windows 7 entry. Once I restarted, the boot menu came up, showing both Windows 8 and 7. BUT, when I try to boot to Windows 7, after a restart, the computer just shows a black screen - nothing else. I would then need to restart the PC to get back to the boot menu and just continue into Windows 8.

    I tried to do startup repair, but it said it couldn't find any problems. When I change the HD Boot order in the BIOS, I am able to go to Windows 7 with no problem - but I would prefer not to go into the BIOS every time I switch OS.

    Any suggestions on getting Windows 7 to boot upon selection from the Windows 8 boot menu? Thanks!

      My System SpecsSystem Spec

  2. #2


    Sofia
    Posts : 135
    XP, Win7, Win8_Eval


    1. Can you post the snapshot of Disk Management so that all disks and partitions are shown.
    2. Output of bcdedit would be helpful too. (on admin prompt execute: bcdedit)
      My System SpecsSystem Spec

  3. #3


    Posts : 4
    Win 7 Ulitmate and Win 8 Pro


    Ok, here is Disk Management screenshot:

    Click image for larger version

    Here is bcdedit:

    Click image for larger version
      My System SpecsSystem Spec

  4. #4


    Sofia
    Posts : 135
    XP, Win7, Win8_Eval


    You have installed Win 8 using EFI.
    Your current system BCD seems to be on disk 1 EFI System Partition.

    So your system is mixed:
    BIOS booting for Win 7 and EFI booting for Win 8.

    1. I am not sure EasyBCD can do EFI booting.
    2. Why are the integrity checks disabled for Windows 7 - any reason like non-signed drivers ?
      My System SpecsSystem Spec

  5. #5


    Posts : 4
    Win 7 Ulitmate and Win 8 Pro


    Quote Originally Posted by boyans View Post
    You have installed Win 8 using EFI.
    Your current system BCD seems to be on disk 1 EFI System Partition.

    So your system is mixed:
    BIOS booting for Win 7 and EFI booting for Win 8.

    1. I am not sure EasyBCD can do EFI booting.
    2. Why are the integrity checks disabled for Windows 7 - any reason like non-signed drivers ?
    Integrity checks are disabled just because I read on another forum that it might help with my issue. Of course - it didn't.

    I was not aware that I installed Windows 8 using EFI. I've never used EFI before, so I never thought to look at this. I didn't even know my new computer build was capable of EFI booting. So, how would I fix this? Reinstall Win 8, making sure EFI is somehow disabled?
      My System SpecsSystem Spec

  6. #6


    Sofia
    Posts : 135
    XP, Win7, Win8_Eval


    Not using EFI booting would be easier as you can get more help.

    EFI booting seems to be not so well known.

    Just reinstall Win 8 but take care to set DVD/USB installation source to boot BIOS way !

    You must delete all partitions on disk 1 (the GPT disk) and convert it to MBR style.
    Use diskedit.exe to acomplish the task. (I am not sure if you can do this with PartitionWizzard - give it a try.)

    On "System Reserved" partition on disk 0 will be your system BCD.

    Using BIOS way of booting Windows always boots to disk 0, active partition.
      My System SpecsSystem Spec

  7. #7


    Posts : 4
    Win 7 Ulitmate and Win 8 Pro


    Quote Originally Posted by boyans View Post
    Not using EFI booting would be easier as you can get more help.

    EFI booting seems to be not so well known.

    Just reinstall Win 8 but take care to set DVD/USB installation source to boot BIOS way !

    You must delete all partitions on disk 1 (the GPT disk) and convert it to MBR style.
    Use diskedit.exe to acomplish the task. (I am not sure if you can do this with PartitionWizzard - give it a try.)

    On "System Reserved" partition on disk 0 will be your system BCD.

    Using BIOS way of booting Windows always boots to disk 0, active partition.
    Thank you! I just reinstalled Win 8, making sure EFI is disabled, and now everything is working perfectly.
      My System SpecsSystem Spec

  8. #8


    Posts : 153
    Win8.1 64 bits Ent- Pro


    Good job man and great help Boyan, way to go amigos
      My System SpecsSystem Spec

Win 7 and Win 8 - Dual Boot Prob.
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