PC not booting past BIOS MSI Z97..

As the title describes my computer won't boot past the BIOS screen. When I don't enter BIOS, the computer will continue to show a black screen with a blinking underscore in the top left corner until the eternity of time.

I can enter BIOS, but I have really limited knowledge of how everything works.
Here are two things that might be a cause:

- I recently installed an oculus rift. To do this I had to change something in the BIOS in order for it to recognize 2 different HDMI's. Really don't remember how or why.
-Sometimes my computer stops to recognise my HDD. At the moment when i go to system status it's also only displaying my crucial SSD 250GB on SATA 5 of 6. Others state not present.

I'm not sure if this matters because im pretty sure I installed windows on the SSD as this is the faster one.

These are my specs:
Intel i74790K 4.00GHz
MSI Z97 Gaming
16GB RAM
Geforce GTX 970
windows 10

On the most left of the Boot priority bar is the EUFI Hard Disk and the SSD is somewhere in the middle. That seemed odd to me so I dragged the SSD on the first spot but that didn't seem to work. ( maybe I did it wrong? ) or perhaps that wassent the problem. Again, I have super limited knowledge and I would so so much appreciate help. Thanks so much!!!