If norton anti virus is installed on home pc ,is thare any need to have another internet security so

protection of pc from internet

If norton anti virus is installed on home pc ,is thare any need to have another internet security software?malware

Anti virus is not a firewall. It could protect you from viruses, but not hackers. XPSP2 has a built in firewall that should be enabled, but I think it is better to go with Zone Alarm which you can get for free at http://www.zonelabs.com

If norton anti virus is installed on home pc ,is thare any need to have another internet security software?norton 360

I find that AVAST is really, really, good. Try it out, I think you will not be disappointed. Avast.com Report It


yes, it will add a firewall, so you have better protection against intruders.
It is wise to have a firewall and spyware protection, such as AdAware or Spybot Search and Destoroy (or both) which are both free. You do not need multiple antivirus software running; this would greatly slow your system down and they may not opperate properly with a second antivirus program running.
Yes definitely there is need to install internet security programs because antivirus will not block unauthorized access to your system from net nor it will block untrusted programs to access the internet, antivirus will only detect the virus files. so you must install a firewall (norton firewall recommended) and a antispyware program (Ad-aware) to make your system secure.
The best for internet security is still ZoneAlarm.