I tried to install Lubuntu 20.04.2 on my laptop from a bootable USB stick.
I launched a live session. Then I started the Lubuntu installer. I selected my location, keyboard, etc. Everything worked perfectly well. When the installation process finished, I switched off my computer, and when I started it again, I got this message :
“Operation system not found”
When I press “Enter” button, I have this message during 2 seconds (then I switch automatically to the boot settings) :
I tried to modify the boot settings (UEFI, legacy, etc.) but it did not work.
I have already searched how to fix this, but I did not found the solution yet
Any idea where to start ? I hope someone will be able to help me !