Answer
This question was answered on April 5, 2006.
Much of the information contained herein may have changed since posting.
Spyware comes in many forms and your antivirus program will help protect you from the nasty forms of spyware. But there are other forms of spyware that may not be covered by Norton. There are free tools out there that do a great job. One is Spybot, you can find a free copy of it at www.download.com, just type in Spybot. Another program is Adaware which is available for free at www.lavasoft.com. Both programs do a good job, together they eliminate just about every spyware threat out there. It's best to run one and then run the other immediately after to cover your bases.