not without knowing what your H/W manufacturer is . .
- when it is booting, it should should give a key to press, to get into the bios area.
just look around, maybe in security or advanced, for something about secure_boot - see if that can be turned off.
also look for UEFI & see if that can be set to legacy bios.
- if you can get through all of that, then look at this newbie thread:-viewtopic.php?f=90&t=128430
or this one:-viewtopic.php?f=46&p=698977#p698977