If you just install a GOOD antivirus and a GOOD firewall, then you don't necessarily have to install the rest - less to configure. However, you will be less secure, regardless of what route you take, if you "put your eggs in one basket". What you could also do is this: (specific...
Symantec developers security software for business and consumers and helps customers protect their computers, information, identities and infrastructure by delivering software and services that address risks to security with various products such as Norton AntiVirus, Internet security, and anti-spyware ...