I am using Norton antivirus security in my windows 10 PC from last one year but at this time subscription has been ended so this not working properly in my PC. Last night I was working on my PC then it has automatically shut down because too many viruses are running in my device and computer speed has been too slow I think some files have been corrupted. So, I want to renew Norton setup to protect my PC from viruses. At this time I am very frustrated because I am unable to find product key, I have visited too many times at norton.com/setup but I am not understanding where to find Norton setup activation key. Please help me give me some links and guides.