A little problem with GNU GRUB 2.02

hey, it seems like i have a additional issue, and not a small one i’am afraid.

when i start my machine it automatically start a GNU GRUB version 2.02, and a boot override in the bios doesn’t work either, does someone knows how to boot mine os with the GNU GRUB?

a little update. i just installed linux mint mate to test my computer, and that worked perfectly from the first time