Updating Norton Internet Security

Hi

 

I am IT challenged so please bear with me with this question.

 

I have bought the 2011 edition of Internet security as my 2010 version is about to expire. When I update do I need to  download the delete software tool to get rid of the 2010 version and then install the new product or do I just insert the 2011 renew disk.

 

Secondly do I have to do anything with the files that have been quarantined in the 2010 version before renewing?

 

Many thanks