video codecs

[adswrx]

I found a site from someone on this board that sent a link to find newer video codecs. For some odd reason something strange happened to my computer and now half of my videos make windows media player freeze. These are all videos that i have already watched and some new ones. I have no clue what happened. Any ideas, or links to a video codec site? I already have the updated codecs from windows, but dont seem to help.