Anti Virus, Spyware guard, and firewall question?

I have norton antivirus 2007, Zone Alarm basic, and spyware doctor. I normally run both norton and zone alarm together. would it be okay to also run spyware doctor with the on-guard protection? Or is that too much?

Anti Virus, Spyware guard, and firewall question?antivirus download

Run ONE program doing it all, otherwise things slow down. Try the 30 day trial of Pandasoftware.com. ~

Anti Virus, Spyware guard, and firewall question?bmw

It's fine to run all of those things but each one will slow down your computer and like drugs their combined effect may really make your machine run slowly. Personally I just run AVG for antivirus/firewall and that's all I need, but then again I'm more wary of viruses and spyware than the average joe.
get mcafee it does it all at once
Virus - is a program written to alter the way a computer operates, without the permission or knowledge of the user, it hides in other program files. It replicates itself and executes.To know more about how viruses attaches itself to computers and to learn how to combat them. Check out http://sumiram2006.googlepages.com/comba...
It would be okay provided you have adequate RAM.
You can run more than one antispyware program at a time without any problems.