After almost losing my HD by these days , I finally bought a anti-virus. Norton was my choice , and has been working fine for me (consider that I have an old P100Mhz with 32Mb
). Did not crash my system ,and saved me already from some attacks. I bought the version that comes with AD-Block and Firewall/Security. That is where it let a bit down. I run my ZoneAlarm togheter and sometimes , ZA get's what Norton (Firewall) should get...but do not. Aside from that , no regret.Is money well spent.