Gray Icon?

Today, I had a WIndows XP update. After the restart, I noticed that the Norton icon was a gray circle with a whiteline/hash. After a while, it turned to the normal green circle with a white check mark. What's the significance of the grey icon?

As I saw it usually reports that Norton is not loaded totally. However sometimes the tray icon do not refresh so often when this gray thing is there, and the product is loaded a long time ago, just the icon is still the same gray.

 

When this happens again, please open Norton 360, and check what does it show. If everything is green, it's just a refresh issue.