In computer should we have both internet security and antivirus software or anyone of them we use it

You should have ONE anti-virus, ONE firewall, ONE spam filter, and several spyware filters. The anti-spyware will work with each other, but the other elements may see the competing software as an "infection."

In computer should we have both internet security and antivirus software or anyone of them we use it?antivirus

yeah what wiscman77 said

In computer should we have both internet security and antivirus software or anyone of them we use it?computer

Yes! Also, use a firewall that blocks outbound traffic as well as inbound traffic, Windows XP firewall only blocks inbound traffic. Along with spyware(more than 1), also recommend a rootkit revealer(detects changes in your software hive,ie: the very core of your computer).