Internet Security 2012 " At Risk" statement

I have used N.I.S for some years and have recently bought and successfully loaded 2012. This has run for about a month. However yesterday I kept getting an " at Risk" warning that my Antivirus is out ouf date, which it shouldn't be.. What ever i do to fix the problem using the Norton support services I can not resolve this. I have uninstalled and re-installed the product and it still gives me an At risk status.  Also, when I try to log into a reputable web site, it says the site's security certificate is out of date( even the Norton one did this, I had to override it to send this message.) It is the first time on the forum so I hope someone can throw light on it as i am completely baffled.