Had this showing up regularly in the event log of one of our Exchange servers. A quick delete of the following keys and a reboot all sorted:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\Microsoft\Windows\PLA

ExchangeDiagnosticsDailyPerformanceLog

and

ExchangeDiagnosticsPerformanceLog

References: http://exchangeitup.blogspot.co.uk/2016/01/exchange-2013-error-microsoft-exchange.html

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