Windows 8/10 dual boot problems with booting to the secondary system


  1. Posts : 40
    Windows 8.1/10 Enterprise x64
       #1

    Windows 8/10 dual boot problems with booting to the secondary system


    Hi, I installed Windows 10 as clean OS beside of existing Windows 8.1 installation as secondary OS to second physical drive. When booting to Win 8, everything works fine but when booting Windows 10, I get the error screen shown below. The weird on it is that everything is at it's place since when I press Escape on this screen, it takes me to BIOS, which I exit without saving and after reboot I already can normally boot to Windows 10. After restarting from whichever Windows the situation repeats. At least I can boot to 10 with the described workaround, but I want to fix this annoying issue. I'm just thinking that after BIOS exit the volumes table may be for some while different than in Windows. I even tried to re-add the boot menu entry for 10 from Win8 session but is the same, so the boot entry is correct. Any idea what's wrong?




    Just for case the BCD config is this:
    Code:
    Windows Boot Manager
    --------------------
    identifier              {bootmgr}
    device                  partition=\Device\HarddiskVolume2
    path                    \EFI\Microsoft\Boot\bootmgfw.efi
    description             Windows Boot Manager
    locale                  en-us
    inherit                 {globalsettings}
    default                 {current}
    resumeobject            {ac05b954-fe31-11e8-ae14-ef9370ccff74}
    displayorder            {current}
                            {ac05b955-fe31-11e8-ae14-ef9370ccff74}
    toolsdisplayorder       {memdiag}
    timeout                 15
    
    Windows Boot Loader
    -------------------
    identifier              {current}
    device                  partition=C:
    path                    \Windows\system32\winload.efi
    description             Windows 8.1 Enterprise 64-bit
    locale                  en-us
    inherit                 {bootloadersettings}
    badmemoryaccess         Yes
    isolatedcontext         Yes
    allowedinmemorysettings 0x15000075
    osdevice                partition=C:
    systemroot              \Windows
    resumeobject            {601b1f5d-e1a1-11e8-87b9-54bef771218b}
    nx                      OptIn
    bootmenupolicy          Legacy
    detecthal               Yes
    quietboot               No
    
    Windows Boot Loader
    -------------------
    identifier              {ac05b955-fe31-11e8-ae14-ef9370ccff74}
    device                  partition=\Device\HarddiskVolume8
    path                    \Windows\system32\winload.efi
    description             Windows 10 Enterprise 64-bit
    locale                  en-us
    inherit                 {bootloadersettings}
    isolatedcontext         Yes
    allowedinmemorysettings 0x15000075
    osdevice                partition=\Device\HarddiskVolume8
    systemroot              \Windows
    resumeobject            {ac05b954-fe31-11e8-ae14-ef9370ccff74}
    nx                      OptIn
    bootmenupolicy          Legacy
      My Computer

  2. NavyLCDR's Avatar
    Posts : 15,515
    Windows 10 Pro
       #2

    I notice you are running enterprise versions of Windows. How are you activating the enterprise versions?
      My Computer

  3. Kari's Avatar
    Posts : 17,434
    Windows 10 Pro
       #3

    NavyLCDR said:
    I notice you are running enterprise versions of Windows. How are you activating the enterprise versions?
    Noticed and thought the same thing. Anyway, OP's post does not contain any screenshot or other information about an error.
      My Computer


  4. Posts : 40
    Windows 8.1/10 Enterprise x64
    Thread Starter
       #4

    That's because the screenshoot was removed, someone doesn't like Google Drive?
    Trying to post it again.



    If I list volumes, the actual partition with W10 installation is identified as Volume 6, but bcdboot A:\Windows clearly adds Volume8 which comes weird too.

    Exact volumes list as provided with Diskpart:
    Code:
    DISKPART> list volume
    
      Volume ###  Ltr  Label        Fs     Type        Size     Status     Info
      ----------  ---  -----------  -----  ----------  -------  ---------  --------
      Volume 0     N                       DVD-ROM         0 B  No Media
      Volume 1     C   Windows 8.1  NTFS   Partition    256 GB  Healthy    Boot
      Volume 2     D   Apps         NTFS   Partition    176 GB  Healthy
      Volume 3                      RAW    Partition     32 GB  Healthy
      Volume 4         System       NTFS   Partition   1024 MB  Healthy    Hidden
      Volume 5                      FAT32  Partition    100 MB  Healthy    System
      Volume 6     A   Windows 10   NTFS   Partition    141 GB  Healthy
      Volume 7     S   WinPageFile  NTFS   Partition     12 GB  Healthy    Pagefile
      Volume 8                      RAW    Partition     96 GB  Healthy
      Volume 9                      RAW    Partition     32 GB  Healthy
      Volume 10                     RAW    Partition    417 GB  Healthy
      Volume 11    Z   Backup 2     NTFS   Partition   1088 GB  Healthy
      Volume 12    H   Data 2       NTFS   Partition   2638 GB  Healthy
      Volume 13    I   Data 3       NTFS   Partition   1365 GB  Healthy
      Volume 14                     RAW    Partition     32 GB  Healthy
      Volume 15    J   PORTABLES    FAT32  Partition     20 GB  Healthy
      Volume 16    Y   Backup 1     NTFS   Partition     95 GB  Healthy
      Volume 17    G   Data 1       NTFS   Partition   1280 GB  Healthy
      My Computer

  5. NavyLCDR's Avatar
    Posts : 15,515
    Windows 10 Pro
       #5

    You didn't answer how your Windows 10 Enterprise is activated. And also the associated question of where did you obtain Windows Enterprise from?
      My Computer


  6. Posts : 913
    CP/M
       #6

    Maybe HW problem (improper disk init). Try to connect your win10 disk to different sata port.
      My Computer


  7. Posts : 40
    Windows 8.1/10 Enterprise x64
    Thread Starter
       #7

    There's no choice of other SATA port as it's laptop. To boot from second drive it's always required to enter BIOS first to refresh the volumes table. As the secondary OS is seldom used it's not such a big issue, but I anyway want to get clue why after exiting whichever Windows session volumes mapping is changed or even all drives except first HDD are not visible. So yes, it may be HW failure, or BIOS failure, but so far no metrics for that. An option of boot logging would help.
      My Computer


  8. Posts : 913
    CP/M
       #8

    As the issue emerges before OS start, there are a few options only, including:
    - physically exchange two disks
    - different bios version
    - some change of bios settings (secure boot, boot order...)
    - test different hdd/ssd
    - placing both systems at first hdd.

    Boot logging:
    Enable or Disable Boot Log in Windows | Tutorials
      My Computer

  9. spapakons's Avatar
    Posts : 2,891
    Windows 10 Pro 64-bit 202H (Nov 2020 build 19042.867)
       #9

    If Windows 10 is second, you should set hard disk priority in BIOS so the disk with Windows 8 is first followed by the disk with Windows 10. Then boot with Windows 10 DVD or USB and do a startup repair to fix any booting issues.
      My Computer


 

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