Cpmputer protection good enough?

I have

-Norton Internet Security 2007

-Spybot Search and Destory

-Ad-Adware SE

-Avast Anti Virus

is that good enough? need a fire wall anything? please tell me where to get it and stuff If I DO need it.

Cpmputer protection good enough?symatec

Firewall is most important. Zone Alarm free version does the job. I think Windows firewall only guards against stuff coming in, not stuff being sent from your pc, so get Zone Alarm. I'd get one more anti-spyware as well, say AVG or superantispyware.

Cpmputer protection good enough?vista

well heres one thing noriton doesnt want you to know. if you get a pop up from it saying something is trying to access a server or something else. block it. it has massive spyware problems and could get your information. to be extra safe turn on your firewall.
If you are using the Anti-virus with NIS2007 alongside Avast, that could cause a lot of problems. See below with a reference link to Norton.

Only use one anti-virus product. Running more than one can cause conflicts thus rendering each ineffective. Same goes for firewalls

http://service1.symantec.com/SUPPORT/nav...

You can install a few extras such as SpywareBlaster which blocks spyware before it even installs and uses no resources.