To Many Anti's?

VirusWare, SpyWare, CookieWare, PopupWare, MalWare, HijackWare, AdWare,TrackingWare; some find this, some find that; some stop this, some stop that; some see other ProtectionWare as BadWare; some conflict with other Ware’s and steal copious amounts of CPU time. I am currently running Norton Internet Security with XP Home; I also allow SpyBot to run because of more than one occasion when SpyBot popped up with warnings of a malicious site. Why didn’t Norton say anything; was this really a malicious site, Norton is the one I pay the bucks to. What was my question? Oh yea; What do I do protect my system?