I am evaluating KAV5 Personal. I have noticed that the rate of successfully updating virus signatures is erratic. I have set the update to occur every 3 hours, and the update "succeeds" about half the time. The other half of the time, the update "fails". The same happens when I set it for hourly updates. My firewall is set up OK (obviously, otherwise the update would never succeed). Any ideas? One of the things I like about KAV is the frequency of updates. Any input would be appreciated.