Hello. I was participating in the NAV 2005 thread and thought this might be a nice topic to discuss. It concerns virus signature updates. https://www.wilderssecurity.com/showthread.php?t=47637 1. Why do AVs like NAV and McAfee update their virus signatures once a week, except if there is a virus outbreak, then they are updated as needed, while a good majority of AV products update their virus signatures on a daily basis? 1B. If NAV and McAfee make daily files that can be download manually daily, why not just provide them as automatic daily updates? 2. Are the AV companies that update their virus signatures daily, over reacting. Are these daily virus signature updates not really needed? (If Symantec and McAfee aren't overly concerned, why should the others be?) Just something for discussion. I know I'm interested in your thoughts on the subject. I'm sure there are few more like me out there.