High-bandwith digital content protection problem.

I am trying to watch a movie of which I previously bought and downloaded. I was going to watch it when I got a notification about there being a High-Bandwith Digital Content Protection and that it is only possible for me to watch if it is supported. I have never seen those before and am very confused by this. How do I make it so that I am able to watch the movie without that being a bother for me?