I updated my machine and was rebooted into a terminal. I went into bios, changed Windows OS to Other OS in the boot settings.
That got me to the login screen. I put my details in and it just takes me back to the login screen.
I disabled secureboot. Same thing.
Graphics card is an AMD R9 390 (the reason I can't upgrade to 16.04)
Mobo is an Asus b150m-a
Intel i3 6100
The machine will load into a Guest Session.