Windows Server 2012: Clear Event Log
This tutorial teaches you to clear event log on Windows Server 2012.
Clearing your event log can sometimes help when recurring issues are present by easily being able to sort through less amount of log data. Clearing the event log is very simple. Open up PowerShell as Administrator and simply run the following command:
wevtutil el | foreach { wevtutil cl $_ }
Don’t be alarmed, you wont be receiving a confirmation message that the logs have been cleared. Simply re-open Server Manager or the Event Log viewer and all the entries will be cleared!