From what I'm reading SURFSIDEKICK is a menace and a half. Symantec users do not have to fear. It also must be downloaded by the user. Warning, don't use it, don't believe their hype.

Spyware Scorecard v2.0, SurfSideKick violates the following criteria: First, Installs or updates without user permission or knowledge at time of installation. Also, bundled with a variety of other pests. Displays popup/popunder ads that are displayed when main product is not running or do not appear to be connected with the product. Third, Silently connects to an unintended location to transmit personal information. Fourth, Defends against removal of or changes to its components.

VERY hard to manually remove it.