Ensure that the WS-Management service and the agent are installed and running and that a firewall is not blocking HTTPS traffic. ...

Ensure that the WS-Management service and the agent are installed and running and that a firewall is not blocking HTTPS traffic. 

This problem can also be caused by WMI service crash. Ensure that KB 982293 (http://support.microsoft.com/kb/982293) is installed on the machine if it is running Windows Server 2008 R2. 

If the error persists, reboot %ServerName; and then try the operation again.