See the announcements at the top of this forum. Your subscription is not likely to be chraged for renewal as OneCare is at end of life and renewals will actually be disallowed later this year.
If your subscription is due to expire soon, go to https://billing.microsoft.com and sign in with your subscription LiveID. Click renew for OneCare and you should be presented with a free 6 month extension.
-steve
Microsoft MVP Windows Live / Windows Live OneCare, Live Mesh, & MS Security Essentials Forums Moderator