Hello AtunHotepRe, I'm sorry to hear about your stolen computer. To find the Live ID associated with your One Care subscription go to another computer in your circle, open One Care>Help>About Windows Live One Care, and you will see the Live ID. I suggest contacting support to change the Live ID and password associated with your subscription. How to reach support - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2421771&SiteID=2