Many Bioses have the F10 function to show a Boot menu with a list of Peripherals to Boot from ! Have You actived this function ? Have You tried to flash Original One again to clear Bios and NVRAM ? Regards
I'm so dumb, because it's a laptop I forgot about clearing the bios settings. Although aren't bios settings stored in flash nowadays and the battery is only for the real time clock? Anyways I#ll try to remove the battery for an hour and see if that clears it.