I moved your post to the Update topic folder.
It is not clear what problems you were having or are having, but if they existed when your were in trial mode, activating a subscription does not change anything. However, if your trial had expired, you would have been unable to update the definitions.
Information to help troubleshoot and resolve update problems -
http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=1286736&SiteID=2
-steve