1.    15 Dec 2015 #1
    Join Date : Nov 2015
    Posts : 5
    Windows 10

    Problems dual booting Windows 7/10 (UEFI?)


    Hi all,

    This is my situation:


    I running into troubles that I think are having to do with UEFI. Secure boot is disabled.

    I've tried these things:

    Situation 1:
    • Create a bootable USB using Rufus (GPT partition)
    • When booting I get this error.


    Situation 2:
    • Mount the VHD.
    • Manually install Windows 7 using Dism /apply-image command.
    • Add bootfiles
    • Add entry in Boot Loader (using EasyBCD).
    • When booting I get a black screen (nothing else, even ''starting Windows'' does not occur).


    So currently I have no idea what to do next. Could anyone give me assistance?

    Thanks in advance!
    Attached Thumbnails Attached Thumbnails boot.JPG  
      My ComputerSystem Spec
  2.    15 Dec 2015 #2
    Join Date : Oct 2015
    Posts : 1,967
    Windows 10 Pro X64

    Hi,

    Add entry in Boot Loader (using EasyBCD).
    That's what's caused it. So, yes it is UEFI related and GPT related too.

    Cheers,
      My ComputersSystem Spec
  3.    15 Dec 2015 #3
    Join Date : Nov 2015
    Posts : 5
    Windows 10
    Thread Starter

    Quote Originally Posted by fdegrove View Post
    Hi,

    That's what's caused it. So, yes it is UEFI related and GPT related too.

    Cheers,
    Thanks! So I should follow the steps again without adding the Boot Loader Entry?
      My ComputerSystem Spec
  4.    15 Dec 2015 #4
    Join Date : Oct 2015
    Posts : 1,967
    Windows 10 Pro X64

    Hi,

    Either that or using the inbuilt command bcdedit but I'm no expert on that one on a VHD.

    Bottom line is EasyBCD isn't really UEFI aware which is why it wrote a MBR to the disk and you now see the textual boot menu.

    I'm assuming you didn't try to boot the machine to the VHD prior to running EasyBCD ?

    So far, the only boot record editor other than the one that comes with Windows itself I've used reliably is Bo Yans' VisualBCD.

    Have you tried letting Windows set up trying to self repair the start up problem running from the install media ?
    Not that that has ever worked for me once VisualBCD had had a go a the boot record but YMMV.

    Cheers,
      My ComputersSystem Spec
  5.    16 Dec 2015 #5
    Join Date : Nov 2015
    Posts : 5
    Windows 10
    Thread Starter

    I tried it again today, but it still boots to a black screen. I'm wondering if there are any old boot files left behind, as I got a Windows 7 style boot loader.

    These were the exact steps I followed:

    In disk management:1. I created a new expandable VHD.
    2. I initialized the VHD. It asked for the partition style (GPT/MBR). I chose GPT.
    3. I created a new NTFS volume on the VHD and assigned drive letter X: to it.
    4. I mounted the Windows 7 ISO on drive E:

    In the Command Prompt
    5. I installed Windows on the VHD using the following command:
    Dism /apply-image /imagefile:E:\sources\install.wim /index:4 /ApplyDir:X:
    6. I added boot files to the partition using the following command:
    bcdboot X:\Windows (source)

    I have attached a screenshot of the boot entries.

    Thank you for your help Click image for larger version. 

Name:	boot entries.PNG 
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      My ComputerSystem Spec
  6.    18 Dec 2015 #6
    Join Date : Nov 2015
    Posts : 5
    Windows 10
    Thread Starter

    I also noticed that I seem to have two recovery partitions (450 MB each) on my primary drive. Is this normal? Could it have something to dow with the problem?

    Below is a screenshot of my disk manager:

    Click image for larger version. 

Name:	diskmanager.PNG 
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Size:	10.3 KB 
ID:	54187
      My ComputerSystem Spec

 


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