Did you purchase your subscription from the One Care site? If so you would have needed to use an existing Live ID or you would have been asked to create one at the time of purchase. That is the Live ID you need to use to activate One Care. A Live ID is the e-mail address you used to make your purchase. If you don't recall the Live ID and password used you can contact support for help with retrieving your subscription information. How to reach support - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
Jim - MVP Windows Live - Forum Moderator - Live One Care - Live Mesh
Did you purchase your subscription from the One Care site? If so you would have needed to use an existing Live ID or you would have been asked to create one at the time of purchase. That is the Live ID you need to use to activate One Care. A Live ID is the e-mail address you used to make your purchase. If you don't recall the Live ID and password used you can contact support for help with retrieving your subscription information. How to reach support - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90
Jim - MVP Windows Live - Forum Moderator - Live One Care - Live Mesh