Laptop with Vista Business, Windows Media Player 11.

A few weeks ago, the user downloaded RealPlayer, but didn't have a problem
Live Video Streaming using Windows Media Player... until last night, received
Error Message - C00D11BB

Additional information led to Error C00D2EE0
said that it was the original error and could have been caused by a conflict
with another program, such as RealPlayer...

Uninstalling RealPlayer didn't help...

I am "clueless" as what to do to correct this problem... Any help would be
appreciated ~ Thanks!