Well since like 4 days ago...everytime i try opening a video or music file on my laptop, WMP or any other player like (E.G: realplayer, itunes, quicktime) have been freezing on me. Iv tested the files on other computers by transfering via flash drive, and they work fine. And another thing, once it freezes, it like says that their is no audio mixer devices on the computer (when a second before their WAS).