Norton Internet Security 2011: Upgrade

Good Evening:

 

I noticed that NIS 2011 is now available.  I'm currently running NIS 2010.  How does one upgrade to NIS 2011?  Within NIS 2010, do I simply go to Help & Support>Check for New Version?  If so, can I install NIS 2011 directly over NIS 2010?  Or, do I have to uninstall 2010 prior to installing NIS 2011?  Can you provide step-by-step instructions on how to perform the upgrade?

 

Is there anything I have to do to ensure a trouble-free installation?

 

One last thing: Am I better off not upgrading to NIS 2011...and just continue using NIS 2010?

 

Thanks,

 

John

 

PS: Sorry for so many questions...

 

Dell XPS 400; 2 GM RAM; 3 GHZ Dual Core (Intel); Windows XP MCE 2005; NIS 2010; Malwarebytes (free); SuperAntispyware (free)