Hyper-V Event Log Monitor is a built in performance monitor, which is automatically added to devices identified as Hyper-V Hosts.
Hyper-V Event Log Monitor is turned off by default. To switch it on, select the Hyper-V host, click the device card and either:
From the Hyper-V host device card, select Device Properties > Virtualization.
Click the checkboxes to include the Hyper-V Event Log messages you want to retrieve.