It starts off fairly typical of most AVs today, using a traffic-light inspired theme... Green means you are protected and no action is required on your part (other than maybe asking if you want to register online). Yellow means that there is something that requires your attention but it is NOT critical. I have seen the yellow once before but I cannot remember off-hand what it was for. Whenever there is an issue it is usually red it seems. Red means either you're infected, or one or more of the shields are disabled. These are considered "critical" issues. Now here's where it gets interesting. This is something they have inherited from Prevx 3.0 and I am really curious why they made this its own color instead of just using YELLOW for this... Blue means a scan is required. So why does "scan required" get its own color instead of just being a yellow? The help manual does not even mention the blue state. Mystery of the blue color's purpose, lol.