Computer died - need to re-install NIS (ongoing subscription)

Hi,

 

I need to reinstall Norton Internet Security (had to re-install Windows on my machine).  I can see there are trial downloads and downloads that you pay for.  Since I have ongoing subscriptions to three copies of NIS - I desire to download something for free and then figure out how to add the license.   Where should I go to get my NIS back?

 

Thanks,

 

David