yashugan

Hi every one. I have a stranìge problem, never see before. Alll the windows codecs not work. I re.installed windows from the start, but nothing. When i open the media player, or any othe existing program that use a windows codec, i see only black screen. But i can listen the sound. so, the system say me, that the file msdmo.dll is missing. Where i can find this file? What i can do? Thank you every one!