I am trying to play mpeg2s on my computer, but I keep getting a window that tells me "The Cineplayer Decoders have not been activated. You must activate product before use." I searched it on google and it turns out cineplayer is some 15 dollar program that adds onto WMP. I dont plan on paying 15 bucks to watch my own mpeg2 files. What are my options and why is it doing this?