i use zone alarm with anti-virus, a program that includes an award-winning firewall and anti-virus software.. i used it for about half a year now and my pc is still running in good condition! i only use a 128mb ram but it runs pretty quickly on my computer. I tried norton before and i think it's not as good because it takes up too much memory to run. i think ZA with antivirus can do as well as norton antivirus..
so i prefer ZA rather than norton