- Create Live Stick with Manjaro
- Download: https://manjaro.org/downloads/official/gnome/
- Create bootstick: https://manjaro.org/support/firststeps/#making-a-live-system
- Change UEFI Settings on your broken system: Boot > Secure Boot > Other OS (You can also disable UEFI, but make sure to re-enable it after you are done here!!)
- Boot broken system with the live-system