Movie Maker will continually crash while working on a project, and/or while working on many of my projects, the video turns gray with a exclamation point over it, and all video and audio fails to work.

The problem right now however, is spending tons of time on a project, with no hiccups and no issues, then saving and closing MM. Next time I open it to view the movie or edit it however, it loads with the afore mentioned problem already apparent, without doing anything.