pc pestilence

I have picked up a piece of junk. I use updated versions of AVG, Ad-aware and Spybot.

The symptoms are:

Soon after connecting to the internet, I lose my connection and am unable to reconnect until I close all windows and use Spybot to remove DSO exploits.

Also, an icon for a casino appears on my desktop.

The only clue I have left is a reference to an application called gopher. Does anyone know what gopher is, and should it be in my registry?

Thankyou for your time!