Hi, I have windows 7 premium which came with Windows Movie Maker 2012. After a few uses, I now always get a Black Screen (but timeline and audio work). I have uninstalled and reinstalled the entire windows live essentials package with no luck. I've used fixit for codec updates and have been told all are up to date. I am using only file types that are workable on Windows Movie Maker 2012. All of my other video programs work including windows media player and Cyber link DVD.

Help!