As the name suggests, Norton Antibot 1.0.2 is a utility created by the prestigious Norton (who have spent the last 20 years on PC protection and security), and has been specifically created to stop any malware or spyware from being installed on your PC. It continuously monitors any change done on the Registry and observes the new content of automatically created files.
So if it detects anything suspicious it advises the user of the possibility that it might be spyware to see if you want it installed or not. It is a preventative tool. And everyone knows that in the world of external Internet threats prevention is better than cure.