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Help needed Windows 7

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I am running Windows 7 and have been denied Windows Automatic Updates since February. I get the error code 800B0100 when trying to do automatic updates. I am also getting a Runtime System 32 prevhost.exe error message when trying to upload videos. Any help would be appreciated.
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The error message refers to no signature being available in the subject (what that means, I'm not sure).

It appears (from this article: http://support.micro....aspx/kb/947821 ) that it could be a corruption of the Windows Update stuff in your file system and/or registry. Although the article doesn't specifically cite Win7, it's very similar to Vista, so you may want to give it a try.

If not, the RC is due out in a week, so you may want to give that a try instead.
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