Windows has a reputation in the linux community for being a nosy OS that doesn’t really listen too well to an advanced user. One of these features is its Windows Update.
Every once in a while when you use Windows, it throws you this message to install the really “Important updates”, or the world shall end as we know it.
I was greeted by this, to be particular, the Windows 10 October 2018 update. And I thought okay, no harm, so I click “Restart now”.
Behold! Arrives the blue screen of death.
And after the update I notice my grub boot loader is gone with Windows Boot Manager taking control of the system.
Let’s admit it, Windows has never really been built with a dual-boot system compatibility in mind. As a result, the update seems to have erased the grub boot loader entry from the boot sequence.
Here’s how to get it back:
From your Windows 10, get to the BIOS startup menu by holding down the
Shiftkey while you press
Restartfrom the power options.
You’ll eventually bump into this screen where you can choose
In the next screen, select
UEFI Firmware Settings
In the next window, select
Boot Sequenceas shown.
Boot List Option, select the radio button for
UEFI, and click
Add Boot Option. Now you can browser for your
grubx64.efifile usually located in
efi/ubuntu/directory. Name the boot menu entry, say
Use the arrows in
Boot Sequenceto move your new boot entry to the top of the sequence.
Applyat the bottom right of the screen, and click
Voilà! Your dear grub boot loader should be back.
Feel free to leave a comment if the above instructions don’t work for you, or contribute if you find a mistake.
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