Hi forum, been going through some "training" on an Acer 5552 notebook. I was planning on a wipe and fresh install of Linux Mint and ran into problems booting to my flash drive even after setting it first in the boot sequence and trying the boot menu. I have the UEFI BIOS in 3 of my homebuilt desktops without any problem, obviously they aren't proprietary like something factory built. This is the first I've run into BIOS issues in 20 years of PC building and repair except for a whitelist problem with an old Thinkpad and a WIFI card. So I have flashed this machine to one of the modded 2.14 BIOS's from here and everything works great, all tabs unlocked, but I still have yet to see any dialog line for Secure Boot. I have tried setting an Admin. password and still no sign of the Secure Boot. And it still won't allow booting to the USB drive, which works great in my desktops. This is Insyde 3.5, but the screenshots I have seen showing the Secure Boot are on the 3.7 version. Is there something I am missing here?