If you get the following WMI warning in the Event Log:
Event Type: Warning
Event Source: WinMgmt
Event Category: None
Event ID: 63
User: NT AUTHORITY\SYSTEM
A provider, PolicyAgentInstanceProvider, has been registered in the WMI namespace, <<SID>>, to use the LocalSystem account.
This account is privileged and the provider may cause a security violation if it does not correctly impersonate user requests.
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Then you need to repair WMI. Repair WMI to fix the PolicyAgentInstanceProvider WMI warning.