Norton Internet Security 2011 Startup Question

Hello,

Only been using the 2011 version for a few days and inital impressions are good.  One thing i wanted to ask though was when i start my computer and it boots to the desktop  ( Windows XP Pro SP3)  the Norton Tray icon appears but has a little grey circle with a diagonal white line in it for  30 seconds or so before it turns into the usual green and white tick.  It isnt a real problem but NIS 2010 used to be a green tick straight way.... is 2011 doing a sys check or something ?

Thank you.