Patricia, please contact support via the information here -
How to reach support - http://forums.microsoft.com/WindowsOneCare/ShowPost.aspx?PostID=2421771&SiteID=2
What do you mean by "update my backup....find the program" and "reactivate?"
Is OneCare on your PC? Do you have a shield in the system tray near the clock that has a 1 in it? It should be green.
On the Start menu, under All Programs, there should be an entry for Windows Live OneCare.
You can verify your subscription status by signing in at http://billing.microsoft.com with the same LiveID (email address) used to originally activate.
-steve