Renewal of NIS 2009 or update to NIS 2010?

My subscription to NIS 2009 runs out this month. I have noticed people on this forum using older version of NIS and Norton antivirus.

Since I am not having any issues with NIS 2009 I am hesitant to uninstall it and install NIS 2010 without increased benefit to me.

 

What are the benefits( if any)  to update to NIS 2010?

Thanks