You can’t discuss SCVMM without mentioning WinRM at least once… Prior to hotfixes being installed, WinRM settings that’re known to ease intermittent connectivity issues were implemented. While there’s nothing inherently wrong with making these changes, install the hotfixes below first and see if the issue is resolved first. The less registry tweaking the better. Specifically, we saw Errors and hex codes in refresh jobs. The details may state WinRM is experiencing issues, but it’s only reporting back results on the last action it performed. WMI errors bubble up through WinRM reporting often, so WMI was the real source in some instances. “Install on all Windows 2008 R2 systems managed by SCVMM 2008 R2: The "Win32_Service" WMI class leaks memory in Windows Server 2008 R2 and in Windows 7 – KB981314. And Install on all Failover Cluster Nodes: An application or service that queries information about a failover cluster by using the WMI provider may experience low performance or a time-out exception – KB974930,” said Jonathan.