Insight

• A new, never-before-offered feature of the Norton AntiVirus 2009 was the Insight capability, which enabled the software to identify trusted applications and files. By identifying these types of files, AntiVirus 2009 would not scan them unless the file or application had changed since its last scan.
  
  

Performance

• Norton AntiVirus 2009 provided users with a speedier experience from installation to application usage. Unlike previous versions, AntiVirus 2009 installed in less than a minute and did away with its reliance on Windows installers by providing its own installer. Users could choose their own color schemes for the first time with AntiVirus 2009.
  
  

LiveUpdate

• Norton AntiVirus 2009 did away with previous versions' LiveUpdate feature, which required users to manually check for software updates. Instead, AntiVirus 2009 automatically checked for and installed updates every few minutes.