Mevio and Tazinga takes over and redirects searches

Audio problem
I have tried folowing spyware stuff:
antisuperspyware, spybot, Avg, PC Doctor, CCleaner, and malwarebytes.org. They have all found a few things and corrected them, but none of them have fixed this problem.
Just "out of the blue" I hear a commercial for Godiva chocolates, Walgreens, or Walmart and others.
I know it isn't an actual radio transmission, but is some form of worm/virus/malware.

Search redirects:
After my search brings up a list of links, if I click on one, my search is redirected, usually to a website selling something. None of the antispyware mentioned above has helped with this, either. If I type an address in manually, or use a favorites, then I go to the proper site.