Norton Internet Security has detected new threats . . .

I recently purchased Norton Internet Security 2010 and it has been working fine until the the past few weeks.  When I start my computer, Norton pops up the screen that says it has deteced a new threat but there are no threats listed.  If I click "Apply All", nothing happens.  If I click "Finish", Norton asks me if I am sure I want to exit.  I say yes and close the windows.

 

What is causing this?  How do I fix it?  Should I reinstall?  Should I have another beer and forget it?

 

Greg

 

(I tried attaching a screenshot but it is not an acceptable attachment.)