Unable to use Manjaro after windows update crash ( dual boot )

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[HowTo] Chroot from or into any Linux distribution

Difficulty: ★★★☆☆ Step 1: Mount your system. This works for both GRUB and EFI systems/installations Okay, the first thing to do is to be root. To do so, open a terminal and type in sudo -i then hit the Enter key. You may then give in your password if prompted. We then need to create a directory where we will mount the target system. In this case, let’s make a directory named “chroot”, by entering mkdir /chroot in the terminal. Time to find where is your system located!! To do so, you may e…

The last post seems important:

with any USB iso manjaro
if this not on btrfs you can use

sudo manjaro-chroot -a
and never forget ,
to Exit ( end-chroot )

And also:

If grub menu is empty or boot error, you need boot into a Manjaro LIVE ISO on USB to fix your system. Run the command:
sudo manjaro-chroot [mount with your system partition]
Password: manjaro
Run sudo update-grub or sudo grub-mkconfig

Unable to change grub menu entries because of grub customizer not working

How to reset the “default” GRUB after removing grub-customizer Remove grub-customizer sudo mv /etc/grub.d /etc/grub.d.old sudo rm -rf /etc/grub-customizer Reinstall grub sudo update-grub reboot If it works fine, then you can delete the old directory /etc/grub.d.old. If you want to change grub menu, then: Create new backup of the file grub.cf sudo cp /boot/grub/grub.cfg /boot/grub/grub.cfg.backup Edit this file: sudo nano /boot/grub/grub.cfg You can change, move or delete codeblocks…