Hyper-V Event Log Monitor is a built-in performance monitor added to devices automatically when they are identified as Hyper-V Hosts at discovery time. Hyper-V Event Log Monitor is turned off by default.
To switch it on, select the Hyper-V host, you can either:
From the Hyper-V host device card, select Device Properties > Virtual Monitoring.
Click the checkboxes to include the Hyper-V Event Log messages you want to include in monitoring.