Mounting is something like making a folder take you to a specified partition
when entered. I think it's got nothing to do with your problem.
I think you should take a look at
https://trisquel.info/en/forum/strange-grub-behaviour-trisquel-7#comment-57418
It basically amounts to removing or commenting all the lines in the file
/etc/grub.d/01_PASSWORD , and then running the command "update-grub".
Commenting is adding a # at the beginning of a line, and makes the computer
treat that line as nothing more than a comment (i.e. The computer skips it
and it's only there for humans to read it, not the computer).
