HyperThread must be off! Danger! Probably shouldn't enable virtualization unless using it. Secure boot is off, that is correct.
Do you have the latest BIOS? Will the disk boot if you skip UEFI completely and run in legacy mode? Are you dual-booting with Windows? It hates everything and can mess up BIOS settings to make you love Windows even more. Do you get to the boot> prompt? Then try booting the different hard drives listed above it manually. Good Luck, Chris Bennett
