In IIS, why doesn't Window Authentication show up as one of the options for my web application?

Question

I\'m reading about how to set up windows authentication for my web application on IIS 7. In the description they have Window Authentication as an option in IIS.

Answer 1

I got hit by this and it was something as simple as having not started IIS Manager with 'run as administrator'. Very frustrating, but I got there in the end!