Unity Getting on my nerves, Selections and starting

Ok so unity is acting real weird now, it keeps giving an error : "Compute mesh inertia tensor failed for one of the actors mesh shapes, please change mesh geometry"

The game won't start but the play button is pressed in ?????? Also when i press on something in the project or hierarchy panel or basicly every where it selects the folder or file above the mouse, here is an example http://www.pasteall.org/pic/34231 I selected the first person controller but instead it selected the above folder.

So any idea what these could be ?

Appreciate any help. ~Wentzel