Windows 10: Windows Boot Manager EFI

Discus and support Windows Boot Manager EFI in Windows 10 Installation and Upgrade to solve the problem; I have 3 entries of Windows Boot Manager in my Bios. Has Windows created them as I can't seem to reduce the number to 1 in the Bios. I have tried... Discussion in 'Windows 10 Installation and Upgrade' started by tony bowman w10, Mar 17, 2020.

  1. Windows Boot Manager EFI


    I have 3 entries of Windows Boot Manager in my Bios. Has Windows created them as I can't seem to reduce the number to 1 in the Bios. I have tried clearing the Bios, removing the backup battery and flashing a previous Bios version but they all remain. I suspect they could be the source of my boot problems.

    :)
     
    tony bowman w10, Mar 17, 2020
    #1

  2. GPT SSD Disk - Manage EFI multi-boot for partitions Windows 10 and 8.1


    Sorry i forgot.....C: is windows 10 and H: is Windows 8.1
    Also Efi partition beside Recovery Partition is a partition that i made it for win 8.1 with EasyUefi Pro
    Last efi partition was created for Win 10 for EASY UEFI pro

    I will make your steps and reply for news!!!

    In 2 disk i have linux with Grub2.
     
    Bodo David, Mar 17, 2020
    #2
  3. dictum Win User
    Which tool to recover the EFI partition? Booted into Rescue Disk

    That's not what they suggest here:

    FIX: Steps to Fix Winload.EFI Error - Appuals.com

    Winload.EFI Error, is pretty much self explanatory by it’s name is an error that prevents windows from loading. This is usually caused by corrupt boot records or incorrect boot configuration. Depending on your Operating System, the error message may vary but the keyword winload.efi will be same. On a Windows 8/8.1/10 system, the error usually pops-up in the following form.
     
    dictum, Mar 17, 2020
    #3
  4. Windows Boot Manager EFI

    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, Mar 17, 2020
    #4
Thema:

Windows Boot Manager EFI

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