well…if u’re looking for a free effective and with many features AV,then AVAST is the most suitable for u…if u want a commercial one(paid AV) i have only one advise to give u:DON’T GET NORTON OR MCAFEE!!!there are many others AV u can buy and are rly good(i have tried NOD32,Bitdefender,norton,mcafee,pc-cillin internet security 2007,AVG free,antivir personal and many others that i don’t remember)…nod32 is the best commercial(PAID) AV product u can have(in my opinion)…i recommend AVAST though coz its free ,effective,with many features and with great support(the forum and the ALWIL team rocks!!! ;))