I have windows media center installed on 2 computers in my house. my living room computer is hooked up to my hd tv and i want to record tv and watch dvd's through windows media center and the computer but everytime i try to watch a dvd on either computer it will say decoder error please restart the computer or windows media center and try again. it will just give the same error everytime i try. anyone know what my problem could be??? thanks in advance.