Whenever I start up my mac Norton says I'm at risk and I click "Fix Now", to which nothing happens. It opens the app and it says I'm all protected. Everything is green, I'm just wondering if my computer is actually at risk. It's brand new, about 4 days old and I installed Norton the day I got it. Some times the pop up saying "at risk" also disappears too quickly so that I can't even click "fix now". What to do?