|Just an update:|
Spybot Search and Destroy (the real one) removed additional registry entries and offending files. Be careful, there are many look-a-likes that want to ADD advertising to your machine! The real one is at: http://spybot-download.net/.
My machine runs much better now and Spybot helped a lot, but interesting, the advertising audio still came back. It seems to play every hour or so. I will look for the "real" Trojan remover to continue the search.