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Event "UserEnv" in event viewer

Recently I happened to work on the events generated in the eventviwer.

I found the most common Error, Warning, Information will be like
1> userenv
When you see the description of the error message : "Windows cannot find the machine account, No authority could be contacted for authentication."

The below article will describe why the error comes and what is the resolution for that.

Check this from Micrsoft KB