Invisible Boot Manager on Multi OS system.

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  1. Posts : 11
    Win10/7
       #1

    Invisible Boot Manager on Multi OS system.


    i7-5820k, 3.3GHz
    Asus X-99A/USB 3.1 mobo
    16gigs Ram
    AMD RX480 8gig
    Win 10/7

    I am dual booting win 10 and 7. The install of 10 went smooth and I had the wonderful blue menu screen for some time.
    Attachment 164426

    However, since the Creators update on 10 all I have for the boot manager is a black screen. I can still navigate said screen as if the manager options are still there, which is why I haven't really attempted to fix it since initially having the issue. Today the Restart I initiated hung so I ended up hitting my power button to kill it and boot it back up. Everything was normal until it got to the boot manager screen which was back in its blueness, but the menu was on the left screen as if my desktop was in an Eyefinity group (after booting it was and I didn't set that). Set it back to standard multiscreen non-Eyefinity and restarted afterwards and it was back to black again.

    Reinstallation is out of the question.
      My Computer


  2. Posts : 18,424
    Windows 11 Pro
       #2

    In Windows 10, in a Command Prompt (Admin) - and I think Powershell (Admin) will work also, run:

    bcdboot E:\Windows
    bcdedit /set {default} description "Windows 7"
    bcdboot C:\Windows
    bcdedit /set {default} description "Windows 10"

    The path in red is to your Windows 7 installation. It will be \Windows, but the drive letter might be different.
    The path in green is to your Windows 10 installation, which should be C:\Windows.
      My Computer


  3. Posts : 11
    Win10/7
    Thread Starter
       #3

    Thanks for responding. Doesn't that just add Win10/7 to the menu though? The menu is still accessible with both options. I just can't see it.
      My Computer


  4. Posts : 18,424
    Windows 11 Pro
       #4

    Bcdboot not only adds the entries to the boot menu for the OS, but it also updates the binaries from that OS. So bcdboot adding Windows 10 is what gives you back the graphical boot menu.

    The bcdedit edit commands just rename the boot menu entries.
      My Computer


  5. Posts : 11
    Win10/7
    Thread Starter
       #5

    I'll try it as soon as I get home tonight. Thanks.
      My Computer


  6. Posts : 11
    Win10/7
    Thread Starter
       #6

    It is a no go. Each command completed successfully, but on reboot it was still black and invisible.
      My Computer


  7. Posts : 18,424
    Windows 11 Pro
       #7

    Going to need to see a screenshot of disk management with all the columns widened so we can see all the data in the columns, please:
    Disk Management - How to Post a Screenshot of General Tips Tutorials
      My Computer


  8. Posts : 2,075
    Windows 10 Pro
       #8

    Just an observation on this thread: In the OP first post, his attachement gives me an error message; Invailid attachement specified....blah blah blah.

    Navy.....does it open for you. I can't get it to open in FF or Chrome.
      My Computer


  9. Posts : 18,424
    Windows 11 Pro
       #9

    Invalid attachment for me as well.
      My Computer


  10. Posts : 11
    Win10/7
    Thread Starter
       #10

    Not sure why the attachment doesn't work. It just shows the plain old blue boot menu anyway.
    Here's the disk manager.
    https://i.imgur.com/E6kFdtT.jpg
      My Computer


 

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