I hate to say it, but I hate Norton products.
For spyware protection in real-time, I use Spyware Blaster. (Free)
For spyware scanning (on-demand) that Spyware Blaster misses, I use Spybot Search & Destroy. (Free)
In conjuction with just spyware protection, you also need a firewall.
For this, I use Kerio Personal Firewall on my PC (free), and Zonelabs Zone Alarm (free) on wife's PC. In tandem with the software firewall, my router acts as a hardware firewall. Hardware firewalls prevents incoming attacks. Software firewalls prevents incomming attacks that get pass the hardware firewall, AND prevents/notifies of unsolicited OUTgoing connections (usually initiated by spyware products).
Also have an Anti-Virus program, Kaspersky AntiVirus (not free).
And an Anti-Trojan, Trojan Hunter (not free).
Along with this, I've modified MS WinXP's properties (in the Administrative area) which prevents certain registry entries (which spy/ad-ware / trojans/worms/etc programs just LOVE to mess with).
I have more things done, but can't remember at the moment.
Call me anal, but I don't want my PC's infiltrated by some money-making commerce or script-kiddies.