Hello Bernard,
Which version of Windows?
Is this a home machine, or one used in an office? Are you on a large,
managed network, where access to AutoUpdate is restricted? Is there a WSUS
server on the network?
Any clues in the System events log you can see?
http://support.microsoft.com/kb/555375
Have a look at this article. It may be relevant to your prºblem.
Subject: How to enable WSUS definitions via your WSUS server
5/11/2006 3:33 PM PST
By: Bill Sanderson MVP
In: microsoft.private.security.spyware.networking
For the benefit of the community reading this post, please rate the pºst.
I hope this post is helpful.
Let us know how it works ºut.
Еиçеl