Hi, something seems to be wrong with my windows media player. I cant watch videos that I downloaded or have but can watch a DVD movie. Every time I try to watch a video that I downloaded or have, no video appears but has sounds. Whenever i try watching a video, a message in the buttom left appears "error downloading codec". I tried watching a DVD movie and it worked. I don't know why only the sounds comes out but not the video. Please help me. Thanks.