Try here first:
http://v4.windowsupdate.microsoft.com/troubleshoot/

If not, then please repost in the update group. Microsoft personnel
are there to help solve update problems.
(They may be swamped, so please be patient)

Server: msnews.microsoft.com
Newsgroup: microsoft.public.windowsupdate
or try this URL
news://msnews.microsoft.com/microsoft.public.windowsupdate

...Alan