I have tried Norton which screwed my system up, also had manually uninstall it all. Antivir personal was pretty good but ugly and limited, Avg is intrusive and doesn`t allways update,Panda AV is garbage leaves stuff all over the place. Im using PCCillin at the moment which is very good built in web filter, built in firewall, realtime monitor, emergency lock easy updates and easy to use. God don`t i go on, anyway it`s usually down to personal preference and dosh.
NAV=0 AVG=7 ANTIVIR=8 PANDA=-10 PCCILLIN=10