I currently have NS installed which will expire soon. I just purchased NS with Backup (key only) on Amazon. Do I have to uninstall NS or can I just enter the NS with Backup key? If I need to uninstall first, what is the best way to do that? Where can I get the download for NS with Backup? Do I need to create a new Norton account or can I just change the keys in my current account? This will be used on both Windows 7 and Windows 10. Thanks for any help with this.