is part of the CNBABE spyware application that installs with the CommonName Toolbar, a browser addin for Microsoft Internet Explorer 5.0 and later.
You should be able to go Start > All programs > CommonName, and click on the CommonName uninstaller. This usually does a good job of cleaning up this program.
Chances are you're also infected with other spyware, see the Spyware Tools
link in my signature, then click the Spybot
links provided. Install, update, and run both these programs to scan your system for additional spyware. Fix any items found. If you continue having any problems after that post another reply.