One care says I need to update, but it won't go to a screen that will do that
If it is OneCare itself that needs updating, open OneCare and click Check For Updates.
Information to help troubleshoot and resolve update problems -
http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=1286736&SiteID=2
If it reports that you are missing important updates for Windows, go to http://windowsupdate.microsoft.com
-steve