I have recently re install windows xp on my computer and its all working fine except one thing. when i put in a dvd i cant watch it on windows media player it says that i am missing a dvd codex and to download one. i cant find any dvd software for this and they all want me to pay $50 or more to buy a new program. i would like to just get windows media player working to play dvds ( ive tried vcl media player) it was working before i re installed the software. any help would be much appreciated. thanks