Windows 10: Windows 10 will not boot after Windows 7 Dual-boot Installation.


  1. Posts : 3
    Windows 10 Home, Windows 7 Professional
       17 Jun 2018 #1

    Windows 10 will not boot after Windows 7 Dual-boot Installation.


    I recently installed Windows 7 alongside Windows 10 for better support for older games, however Windows 10 will now no longer boot, it simply goes to a black screen with a circle of spinning dots with occasional disk activity. I have left it like this for at least 3 hours with no change. I can access WinRE as when booting it gives me a Windows OS Selection Screen in which I can select Windows 10 and press F8.

    Things I have tried:
    Safe Mode - Backlight on, nothing else.
    Safe Mode with CSM/Legacy Boot off - Same result.
    Startup Repair
    bootrec.exe from Windows 10 Installation Disc
    Booting normally with CSM on/off.
    Enabling boot logging - Gives me no log
    Chkdsk
    SFC

    According to Microsoft (https://support.microsoft.com/en-us/...creen-problems) this is an issue with graphics drivers however I have not changed any graphics hardware or software on the OS.
      My ComputerSystem Spec

  2.    17 Jun 2018 #2

    Use Easy BCD add Windows 10 to the Boot menu EasyBCD - NeoSmart Technologies
      My ComputerSystem Spec

  3.    17 Jun 2018 #3

    Welcome to the forum. For duel boot you must install the old Windows first as it won't understand the boot sequence of a new version. Can you post a screenshot from disk management showing all the details. We need to see if it's a gpt disk or mbr and if it's uefi as a fix can be different
      My ComputerSystem Spec


  4. Posts : 3
    Windows 10 Home, Windows 7 Professional
    Thread Starter
       17 Jun 2018 #4

    Tried adding it manually using EasyBCD, no success.

    It is a UEFI system, but Windows 7 doesn't boot if CSM is turned off for some reason.Click image for larger version. 

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      My ComputerSystem Spec

  5.    17 Jun 2018 #5

    The question is were are win 7 boot files on its hd or on windows 10 hd you will need to edit efi file rthere are some tools to make that simpler like Manage EFI/UEFI boot options & Manage EFI System Partitions & Fix EFI/UEFI boot issues the easy way!
      My ComputerSystem Spec

  6.    17 Jun 2018 #6

    Samuria said: View Post
    Welcome to the forum. For duel boot you must install the old Windows first as it won't understand the boot sequence of a new version. Can you post a screenshot from disk management showing all the details. We need to see if it's a gpt disk or mbr and if it's uefi as a fix can be different
    That is not true at all, especially when talking about Windows 10 and Windows 7. The bcdboot command will fix it if a person installs Windows 7 second.
      My ComputerSystem Spec


  7. Posts : 3
    Windows 10 Home, Windows 7 Professional
    Thread Starter
       18 Jun 2018 #7

    I booted into WinRE and used the bootbcd command in the command prompt.
    It seemed to fix something as I have a metro style OS Selection.
    However selecting Windows 10 just went to a black screen with the backlight on. I forced off and when it restarted it showed an error saying it needed to be repaired. I went into Startup Repair, but it failed.
    I have attached the log it left. StartupRepairLog - Pastebin.com

    Apparently the Bootres.dll is corrupt. Is it talking about this file?
    Click image for larger version. 

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      My ComputerSystem Spec


 

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