We had this issue last year after years of it working flawlessly WMI Provider Host pins teh CPU to 100% with minutes of it being enabled on teh Firewall. This was raised is with Meraki support,   Server spiking    There was at ticket logged back last year by my colleague Phil Case 09464777   I enabled Ad authentication using groups polices within the firewall for a certain member of the social network group, up until last year this was working flawlessly, then we noticed that the WMI service had pinned the server to 100% This is without AD authentication running on the firewall             As soon as I enable AD authentication using WMI the CPU starts spiking               Less than 2 minutes after enabling the AD authentication the WMI Provider Host spike the server to 100% CPU     We have then disable AD authentication and the task kill the WMI Provider host service       ... View more