I am going nuts. I can't play any video files or DVD's on my laptop (Satellite L505D; Win 7 HP SP1) unless they're online (i.e. youtube). Same for mp3 files. I've run a SFC scan and installed a new codec package. I've tried win media player, WinDVD, toshiba DVD player, Media Player Classic, Roxio, etc. Anyone have any suggestions??