There a few things you can check. Check that your computer date and time are set correctly. You can check your subscription status at http://billing.microsoft.com If your subscription end date at billing is as expected open One Care and if there is a subscribe button select it and when asked for a Live ID enter the Live ID and password used to sign in to billing. If your subscription end date is not as expected at billing or if the expired subscription message persists please contact support. How to reach support - http://social.microsoft.com/Forums/en-US/onecareinstallandactivate/thread/30400b52-7f26-4ba0-bc18-17e305329d90Jim - MVP Windows Live - Forum Moderator - Live One Care - Live Mesh - Microsoft Security Essentials