Hi, I have three copies of Norton Ghost 15. I upgrade one of my laptops from Windows 7 to Windows 10 pro today. This laptop had a registered copy of Norton Ghost 15 on it. After the upgrade, the icon in the tray says "Product trial expires in 30 days". This didn't overly concern me as I still have the Product keys associated with my 3 copies. Unfortunately none of them work. The error I get back is "Cannot activate this product using license key <my license key>. The license key is not valid. Please enter the correct license key". Please advise what I should do to correct this problem. I can provide 1 of the 3 license keys I have if that will help.