When i try and play anything in Windows Media Player 11 it says; ERROR:
C00D11BA Windows Media Player cannot play the file because there is a problem
with your sound device. There might not be a sound device installed on your
computer, it might be in use by another program, or it might not be
functioning properly.
I was using the same program yesterday and it worked fine. Nothing will play
in any other program, it says there is an error. I use Windows XP.
What can i do?

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