Like its more robust sibling, Kaspersky Internet Security 2010, Kaspersky Anti-Virus 2010 leverages anonymous data from its customer base to create a behavioral engine to further strengthen security safeguards. Other than that, though, there's not much to differentiate KAV from its freeware competitors--some of which score better on efficacy tests. Frustratingly, a significant flaw in the interface design stands out because it's related to a key feature. KAV's performance felt fine but benchmarking revealed inconsistencies.
