Windows Live One Care, like most antimalware products, is a subscription service. There are many free antimalware products available but One Care is more than antimalware. One of the benefits of being a One Care subscriber is free 24/7 support, including live phone support. 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