inaccessible_boot_device after simple restart

[Draqz]

First off, I know there are other topics regarding this, but none of them fit my scenario.

So earlier today, I decided to reboot my PC because I left it on during the night by accident.
After the screen came back, i noticed a longer waiting time (usually around 10sec on my system) and then the 8.1 Bluescreen "🙁 Your PC ran into a problem..." popped up. I managed to take a photo of the error.

It says "INACCESSIBLE_BOOT_DEVICE"

I got a lot of stuff on my pc that I don't really want to lose. (Even though it's just a gaming/project PC).
Can anyone help me with that? I'm not the greatest in troubleshooting stuff etc.


specs:

ASUS Sabertooth Z77
Intel i7 3770k @3.50GHz
2x NVIDIA GeForce 660Ti
Kingston 256GB SSD
16GB DDR3 RAM
Windows 8.1 Pro

I overclocked the cpu from 3.5GHz to 3.9GHz a few weeks ago, but reversed it a few days ago.

My SSD had about 10 gigs left when I last checked it.

I do not have a win8 install disk

I replaced my SSD a little bit less than a year ago, old one somehow broke (the connection port where you connect the sata cable)


Thanks in advance.
Cheers

 

[Draqz]

Anyone?