"User authentication failed."
Explanation: This is a pretty straight forward error.. Simply something failed in authentication. Usually it's
a simple username/password error, check caps lock, retype the password correctly, check your token (if you have a token
card/device for authentication), maybe it's your companies Microsoft's Active directory has locked your account for
being old (stale)
or you haven't changed your password in a long time.. most common error is stil mistyped password, slow down and retype