Thanks for any help. I bought Norton Internet Security 2012 for up to three computer in Oct. last year. I installed it on one computer then and installed it on the 2nd one today. It installed fine but won't let me register to activate it. It says to take the original back to store with RECEIPT to reactivate. I don't have the receipt any longer. I bought it at Walmart. Any suggestions? Thanks so much. Jackied