None of the logs referred to in the error exist in that directory. All of the operational logs do, but apparently diagnostic logs need to be activated. I have tried to activate these logs unsucessfully. I do not know if MS has something planned at Windows 7 release, but if this is WAD, there will be alot of inquires about this. I've noticed the same absence of logs in another computer with RC1. Windows 7 has significantly more logs than Vista did, as a third machine still running Vista has no reference to these logs at all.
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