Today I got up and turned on the pc... left the room... came back to a screen saying I needed to do a system repair.
I went ahead and did the repair (though maybe I shouldn't have), rebooted and all seemed fine.
While messing around online I got a Windows activation popup in the taskbar saying that I had to re-activate.
Clicked on the box and got this...
Now, the only thing I really did yesterday was activate Windows and mess around with some art programs.
I'm guessing that the repair messed up the activation, but not really sure what exactly happened.