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#11
Sounds like you need to repair WLM via Programs and Features. Highlight "Windows Live Essentials", click "uninstall/change" at the top, and choose "repair" in the next window. All installed components of the Essentials package will be repaired, including Mail.
Also keep in mind that there are two contact lists available but you will only see one of them depending on whether you are "signed-in" or not. I call them my "signed-in" list and my "not signed-in" list.