Thank you guys. I started having the Avast warning pop up a couple days ago and figured Avast cleared it. When it kept coming back, I ran Malaware Pro with nothing found. I did both the Avast scans and it found it and shelved it, as well as a couple other things, but the messages kept coming and, as the OP stated, multiple warnings every 20 minutes or so.
The sounds of silence after running AdwCleaner is so appreciated as well as the peace of mind.