I currently have NIS 2011 with a 3 PC license installed on 3 machines. I am going to upgrade one of the machines from Windows Vista 64 bit to Windows 7 Home Premium 64 bit, which will require reinstallation of all my programs including NIS 2011. What is the best way to ensure that my computer is protected with NIS 2011 as soon as I put it online? Can I use the same product key over again when I reinstall or do I need to request a new one? Thank you.