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Thread: GRUB menu missing Windows entry

  1. #1
    Join Date
    Feb 2007
    Location
    New Zealand
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    13
    Distro
    Ubuntu 7.04 Feisty Fawn

    GRUB menu missing Windows entry

    Hi All

    After replacing one of the disks on my Ubuntu and Windows dual-boot system, I made several mistakes that made the Grub menu stop working. After using boot-repair from an Ubuntu LiveCD, I now have a system with a working Grub menu that lets me boot into Ubuntu. This is good! However, the Windows entry is missing from the Grub menu. Is anyone able to advise me or point me to information on what I should do to recover the Windows entry on my dual-boot system?
    I have uploaded a boot-repair report: https://paste.ubuntu.com/p/d9DRn94P4x/

    Thanks
    Andrew Mc

  2. #2
    Join Date
    May 2008
    Beans
    4,075
    Distro
    Ubuntu 24.04 Noble Numbat

    Re: GRUB menu missing Windows entry

    The Windows boot files are missing from the Efi System partition /dev/sda2.
    Line 118 - Windows Boot Manager entry.
    Line 114 - Secure boot is enabled

    Can you boot Windows using the dedicated key to reach the PC boot menu (i.e. not grub)?

    If so, then close Windows without hibernation
    Open your UEFI setttings
    Disable secure boot
    Boot into Ubuntu
    Open a terminal and enter:-
    Code:
    sudo update-grub
    Did grub find Windows?

  3. #3
    Join Date
    Feb 2007
    Location
    New Zealand
    Beans
    13
    Distro
    Ubuntu 7.04 Feisty Fawn

    Re: GRUB menu missing Windows entry

    Unfortunately, I am now unable to boot to Windows when I use the boot selector in the BIOS setup. I could do this previously, only a couple of days ago, so perhaps my recent use of boot-repair has stopped the Window boot from working.

  4. #4
    Join Date
    Jun 2009
    Location
    SW Forida
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    Hidden!
    Distro
    Kubuntu

    Re: GRUB menu missing Windows entry

    Boot-Repair will not modify default Windows boot entries.
    It seems something happened to your Windows install & you need Windows repairs.
    Use your Windows repair/recovery flash drive to repair Windows.
    UEFI boot install & repair info - Regularly Updated :
    https://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  5. #5
    Join Date
    Feb 2007
    Location
    New Zealand
    Beans
    13
    Distro
    Ubuntu 7.04 Feisty Fawn

    Re: GRUB menu missing Windows entry

    I have success!
    I followed your instructions and used a Windows Recovery flash drive to recover the Windows boot.
    I found the instructions at https://www.digitalcitizen.life/comm...-boot-records/ and https://unix.stackexchange.com/quest...ubuntu-in-uefi to be helpful for this.

    I then booted Ubuntu by using the BIOS boot selector and used the command:
    Code:
    sudo update-grub
    Grub found the Windows install and added it to the Grub menu.

    I then used the BIOS settings to ensure that the ubuntu partition was the first in the boot sequence (instead of the Windows one), and now my system starts the Grub menu from which I can boot either Ubuntu or Windows.

    Thank you so much for the help.

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