Windows 10: Must boot into BIOS to select Windows Boot Manager manually

Discus and support Must boot into BIOS to select Windows Boot Manager manually in Windows 10 Support to solve the problem; A few weeks ago, my PC started acting odd. It would boot, show the post screen, then give me an error about an operating system not being found and... Discussion in 'Windows 10 Support' started by GuyInDogSuit, Nov 8, 2018.

  1. GuyInDogSuit Win User

    Must boot into BIOS to select Windows Boot Manager manually


    A few weeks ago, my PC started acting odd. It would boot, show the post screen, then give me an error about an operating system not being found and advising me to unplug any drives that don't have an OS on them. Well, I tried that, and it still does it. So I found that I have to press Delete to enter the BIOS, access the boot menu, and manually select Windows Boot Manager on my SSD. Is the bootloader corrupted or something? How do I fix this? I remember you could use a somewhat non-user-friendly software application to fix it in older versions of Windows, but I don't think it works anymore for 10. Or does it? Any ideas?

    :)
     
    GuyInDogSuit, Nov 8, 2018
    #1
  2. MitchellHayes Win User

    Win 10 wont boot until "Windows boot manager" manually selected in boot menu.

    My computer won't boot until I manually select "windows boot manager" in the boot menu in the bios. I used to have to select my SSD to boot windows but now it wants to use "windows launcher" which I haven't seen in a computer's bios as options to boot
    off before.

    Is there anyway I can fix this so I don't have to manually select? (It is already first in boot order.)

    Motherboard is Gigabyte Z77X-UD5H

    Drive is OCZ vertex 4 256 GB SSD

    No physical changes have been made to this computer, but it did recently do a few windows updates.

    Update: After disabling every boot option other then windows launcher it still doesn't boot straight to windows but if I hit any key on the keyboard it will boot. Before disabling I had to hit F12 only then it would be able to boot.
     
    MitchellHayes, Nov 8, 2018
    #2
  3. Yashwanth Kotakuri Win User
    Windows 10 will only boot if selected from the BIOS boot menu.

    Hello,

    Thank you for contacting Microsoft Community.

    We understand the inconvenience you have experienced.

    • You mean to say, every time you need to make changes to Boot Order in BIOS, to start your computer correctly?
    • What is the make and model of your computer?

    I suspect that the problem might be due to outdated BIOS update
    or with Boot Configuration data. Suggest you to check for the latest BIOS update and Chipset drivers for your device hardware on Manufacturer website. If you find a new one, try to update the same to see if it correct
    the issue. If problem still persist, then I suggest to rebuild Boot Configuration Data to see if it makes any difference.

    Let us try to repair your computer by creating a Windows 10 Bootable media (I.e. USB or DVD) using
    Media Creation Tool.
    Use your computer or some other connected to Internet for creating a Bootable media (Windows 10 ISO image file). Once you're ready with Bootable Media, follow the below mentioned
    steps.

    • Insert the Windows installation disc in the disc drive or connect USB media, and then start the computer.
    • Press a key when the message Press any key to boot from CD or DVD appears.

      If your PC does not detect the media automatically
      • During the restart process, read the screen for any instructions that explain how to interrupt normal startup and enter the basic input/output system (BIOS) setup utility. Most PCs use the F2, F10, ESC, or DEL key to begin the BIOS Setup.
      • Look for a tab in the BIOS Setup Utility that is labeled Boot Order,
        Boot Options, or Boot. Following the directions on the screen, use the arrow keys to go to the
        Boot Order, then press Enter.
      • Locate the CD, DVD, or USB flash drive (this might be called Removable Device) in the Boot list. Following the directions on the screen, use the arrow keys to move the drive up so that it appears first in the Boot list. Press Enter. The boot order
        sequence is now changed to boot from the CD, DVD, or USB flash drive.
      • Press F10 to save your changes and to exit the BIOS Setup Utility. Select Yes in the confirmation window. The PC will restart. Allow the PC to restart normally. The scan will take a few minutes and remove any malware that may be infecting your computer.
    • Select a language, a time, a currency, a keyboard or another input method, and then click Next.
    • Click Repair your computer.
    • Click the operating system that you want to repair, and then click
      Next
      .
    • On the Choose an option screen, select Troubleshoot. Select
      Advanced Options > Command Prompt
      under Advanced Options.
    • Type Bootrec /RebuildBcd, and then press
      ENTER.
      This command will rebuild boot configuration data if in case any issue with Boot files causing this issue.

    Once you done with the above steps, see if the problem still persist.

    Let us know how it went.
     
    Yashwanth Kotakuri, Nov 8, 2018
    #3
  4. newconroer Win User

    Must boot into BIOS to select Windows Boot Manager manually

    UEFI boot options disappeared from BIOS; now getting reboot and select proper boot device

    In short, I need to get the system/BIOS to allow UEFI booting of the SSD.

    Computer started up today with default BIOS settings.

    • Only SSD 1(Windows boot) and SSD 2 were listed in BIOS; HDD 1 and HDD 2 were not visible
    • System would not boot. Gave the 'reboot and select proper boot device' message
    • Boot menu has no UEFI/EFI (or Windows Boot Manager) entries anymore
    I went into Partition Magic/Gparted and confirmed :

    • All drives are still showing
    • All drives' data is in tact [EFI volume/partition is still listed (and can be browsed/files accessible)]
    Gparted print out (note dev/sda2 apparently that is normal behavior) :

    /dev/sda1 (locked) EFI System Partition--Fat32--/media/sda1--100.00mb--46.81MiB--53.19MiB--boot,esp
    /dev/sda2 (exclamation mark) Microsoft reserved partition--unknown file system--no mount point--128.00MiB--unused spaced--msftres
    /dev/sda3 basic data partition--ntfs--/media/sda3--118.58GiB--70.78GiB--47.80GiB--msftdata
    /dev/sda4--ntfs--/media/sda4--450.00MiB--327.71MiB--122.29MiB--hidden,diag



    As I am able to boot Windows installation from USB, I tried the standard startup repair. It said it was not able to fix any problems.

    Next I tried to repair the EFI with Diskpart in the shell:

    • sel vol 1 (note that Diskpart states EFI partition is 'hidden')
    • assign letter=z:
    • cd /d z:\EFI\Microsoft\Boot\
    • bootrec /fixboot
    • bcdboot c:\Windows /l en-us /s vz /f ALL
    It completed all tasks successfully. Unfortunately that did not work.

    Other things I have tried :

    • Removing CMOS battery and replacing with a new one - my HDD started showing up again after doing this.
    • Using the old MBR commands(in hopes it would force the Windows startup repair to recognize and fix a problem)
    bootrec /fixmbr
    bootrec /fixboot
    bootrec /scanos
    bootrec /rebuildbcd​
    • Loaded BIOS 'optimized'/defaults (the system did this already once before, hence why I am in this situation, though doing it manually seemed like an option worth trying. Note that after doing this and restarting the system, HDD's stopped showing again)
    • Removed new CMOS battery and left it out of the system for thirty minutes
    • Formatted EFI and msftres partitions, then rebuilt the EFI boot records
    In summary, am looking to force the BIOS to see the EFI partition on the SSD boot drive, as it is not an option any longer.
     
    newconroer, Nov 8, 2018
    #4
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Must boot into BIOS to select Windows Boot Manager manually

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