#1 2026-04-05 17:41:14

MoeJoe

Member

Registered: 2020-09-13

Posts: 11

DualBoot: Windows update removed grub menu

I have a Yoga 7 2-in-1 16IML9 which was dual booting Win 11 and BL Carbon. I applied a Windows update which removed the grub menu. Now, when I boot I go right into Windows and never see the grub menu.
Running

lsblk

from a live USB boot I can see the all Windows and BL partitions.
How do I reinstate the grub menu and dual boot?

unklar

Back to the roots 1.9

From: #! BL

Registered: 2015-10-31

Posts: 2,924

Re: DualBoot: Windows update removed grub menu

^Start with the BL-Carbon Live System (Stick, CD)
Open a terminal and chroot into the system:

lsblk -fp

Mount the appropriate partition(s):

sudo -s

the root system / of carbon

mount /dev/sdXY /mnt

optional if available

mount /dev/sdXY /mnt/boot

or

mount /dev/sdXY /mnt/boot/efi

for i in /proc /sys /dev /dev/pts; do mount --bind $i /mnt$i; done
chroot /mnt /bin/bash

grub-install /dev/sdX

at efi

grub-install

update-grub
exit
reboot

Have fun!