No Automatic boot after Boot Camp (Solved)

So I was playing around a bit some time ago with Boot Camp on my new Macbook Pro.

I was planning on Dual booting with winows, so had heard of Boot camp and gave it a try.
I went through the guide, and resized my harddrive.
But before actually starting the Windows installation, I changed my mind. (Using virtualbox instead).
I rebooted back into OS X and launched Boot Camp to restore Harddrive again.
So far everything is good.
I mostly use sleep so did not notice until I had to reboot some days later.
Now my Mac starts up it hangs for a while and then I get a black screen with white text that says, No bootable device -- insert boot disk and press a key.
Pressing a key will not boot it.
Only option is to hold Power button for 5 sec to turn off computer.

After scouting a bit I found that Holding the Option(alt) key when turning on PC, or rebooting I get to choose internal harddrive as a boot option.
Using that method I can start up the Mac.
I tried to run the disk repair utilities included, but they all come out with no problems detected.

Anyone have a good idea what has happened here, and how I can fix it?

 

I called Apple and they told me about the System Preferences -> Startup Disk.
This solved it, it was set to Network boot!?

Wow I feel like a noob, but then again in Mac world I am.