NIS 2010 and Screensaver or idle scan

I am currently using NIS 2010.  and I have a bit of a problem.  I am on a laptop with windows XP.

 

I have the screensaver set to come on if I do not use the computer for 15 mins.  Within a minute of doing that and small popup box appears in the lower righthand corner near the task bar and says (not verbatim)  Norton is performing a background task: Idle quick scan ... or   idle full system scan.

 

This renders the screensaver useless.   Any one with any ideas what I can do about this?

 

any and all help gratefully accepted

 

Chuck