Is there a "repair install" for Vista 5384?

Is there a "repair install" for Vista 5384?
After running for a few days I am getting a message:
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The User Profile Service failed the logon.
User Profile cannot be loaded.
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I cannot figure a way to sort this out without a complete clean re-install.
Looking through the install screens there does not seem to be a "repair"
option like there is with WinXP.

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Regards

Peter Horsley phorsley@<NO SPAM>melbpc.org.au
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Is there a "repair install" for Vista 5384?