If I understand correctly you have two CDs and have usd the product key from one of them. See this post on how to renew a One Care subscription using a retail product key - http://social.microsoft.com/Forums/en-US/onecaregeneral/thread/d05b54d0-3ba0-4636-9330-3b809f70d126 If you enter the previously used product key you will receive a "product key already in use" error message. If you see this message just enter the product key from the other CD.Jim - MVP Windows Live - Forum Moderator - Live One Care - Live Mesh