I've been using NOD32 for about 2 years now. I'm currently using version 2.7. Never bother to update to 3.0 and now I see 4.0 has just been released. NOD32 will be expiring on 4/1 and I have not renewed my license yet. I've been thinking of switching to Avast or Avira, but why fix something that isn't broken. So I'm leaning towards renewing since NOD since it hasn't let me down yet and works well on my PC. But my question is am i missing something in detection rate by using 2.7 as opposed to 3.0 or 4.0? I know a lot of people still use and love 2.7. I also know that NOD 3.0 got an advance + rating in the Feb 09 AV Comparative report. http://www.av-comparatives.org/comparativesreviews/main-tests Would the 2.7 engine do as well or am putting myself at risk by using an older version of NOD32? Thanks.