well i'm using NAV 2010 until avast 5 is released and guys i have to admit that NAV 2010 is really good...i was always an antii-symantec but this product is really good...its light and seems effective..of course you have to pay...i will install avast 5 anyway..the difference between avast and nav is that avast is good and you can get it for free while for nav you have to pay and pay and pay again from buying a license to getting good support...i dont know if it deserves the money it costs,i would stick with avast coz it has solid protection for free..but to be honest as product is good...didnt expect it from symantec but it happened..