If you have encountered a black screen with a message – Reboot and Select proper Boot device, Or Insert Boot Media in Selected Boot device and press a key, you have come to the right place, as we will ...
Before, when it was 'working' I had the BIOS set to 'Other OS' and every time it booted it would say "Reboot and Select Boot Device", and I would need to reboot, hit F12 and say "No, please boot from ...