While installing SCOM 2016 recently, i noticed that once agents had been added that there were a wave of “WMI is unhealthy” alerts in the SCOM console. At this point UR4 was installed, so thought it must be a new bug. After some research i found that a new hotfix had been released that wasn’t included in UR4. Once this was installed on the management servers the alerts began to close automatically.
The hotfix can be found here: https://www.microsoft.com/en-us/download/details.aspx?id=55792