See the following
http://windows.microsoft.com/en-US/w...error-80070643
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Peter
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"gbmarshall" <> wrote in message
news:3565EA0A-678F-4384-921C-...
> Code error 80070643 - no windows updates will install. I can't install
> anything else either. Had Visual Studio 2010 beta installed and can't
> uninstall/reinstall the new released version. Can't install latest iTunes
> 9.1.1 either. Says windows update service not availalbe. I've turned on the
> service but still nothing works. Done everything every other post/article
> says to do - still nothing. I'm not looiking forward to reinstalling Vista
> to solve this....thanks for your suggestions!