Help with windows media player

Some mpegs and avis i download only play the sound with no picture.Ive got v7.1 and got the codecs too.Are there any other codecs i have to download?Where can i get them?

well, you need whatever codec the clip needs and that can be any number of them. Do you have the latest DivX codec? It seems MS will not help you find it but you can get it at