Norton internet security 2011....my computer crawls now

I just purchased a brand new computer.   It came pre-installed with 2011 Norton Internet Security.  The computer was lightning fast until I registered for Norton.  Now everything is so slow.  I am on the 60 day free trial but if this is what Norton does then I guess I don't want it.  Is there anything I can do to speed the computer back up?

 

Thank You