WMI uses RPC which listens on port 135 but then allocates a dynamic port for subsequent communication. Configure your Firewall to always allow the TCP port 135 exception and follow the dynamic RPC ports. If there is a problem with the firewall, port 135 then you will probably see this error:

ERROR: Message not found for errorCode: 0xC0000001

See How to configure RPC dynamic port allocation to work with firewalls.