One day my WMP was doing just fine. It played music and videos. No problem. I didn't do anything to my system. Then one day it no longer played music but it played videos without sound. When I tried to play an MPG file I got this error saying that WMP cannot play the file because there is a problem with your sound device.

Well I went into Device Manager and checked all my sound devices and drivers and Device Manager said everything was working properly.

I even reinstalled WMP but still it wont play sound. But I do have sound because I get the Windows startup music everytime I boot.

Any ideas what is wrong and/or what should/can I do?