Cant watch movie..

[LadyAries]

Ok im not new to this and well i have never had an issue beofre. I donw load music and it plays fine. Yet when I donw load a movie an open it either in media player or media centre it says that the player may not support the files. An then i get a code...C00D1199.
I am trying to down load another version of this movie and am hopin that I just down loaded a crap one. Is there any advice you can offer me.
I have windows 7 and the computer is fairly new so I have no idea wat fire walls i have.
PLease help i wanna watch me movie.....