Have you tried:
Automatic Updates and WindowsUpdate Reset tool
Otherwise - How to obtain assistance from MS Support
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TaurArian [MVP] 2005-2009 - Update Services
How to ask a question: http://support.microsoft.com/kb/555375
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"IronMike" <IronMike@discussions.microsoft.com> wrote in message
>I get a 80244019 error when I try to update Vista 64. Not only that but I
> get an error when I try to update the Media Center, Defender (error
> 0x80190194), anything at all. Have I been blacklisted by Microsoft?
> I tried reinstalling Windows but the problem is always there. It's not a
> virus. All other sites by other companies work fine.
> I tried to call for help but Microsoft tells me the free period has
> Strange because it was a new installation at the time.
> Can anybody help me here?