Hello. I tried to play a DVD movie on my PC but when I start up my WinDVD only the top left part of the movie is showing. the rest is invisible(the part that is showing is displayed in fullscreen) and i also get a message before the movie plays "the intervideo features may be in use by another application so the movie will be opened in DVD-video mode. I tried to use another DVD player, i didn't get that message but again only the top left screen was showing. What should i do?