Ok so i just go this new computer right and i transfered music and movies from my friends computer...I went to watch them and windows media player gave me this error message so i try to see what the peoblem was it says i dont have a Mixer Device on the computer which allows me to hear thing's and allows the computer to even know what to do with a media file so i need help Installing a mixer device cause after i downloaded it i didnt know where to put it so can someone please help me................