Windows 7: Windows Media Center Event Viewer Log, someone help.

So I enter the pin to connect to windows media center, that goes through fine, and it starts contacting on my Xbox and just as it's about to "configuring your extender" it cuts off and displays "Windows media center has encountered an error while trying to configure your computer with this extender". I checked event viewer and the error is as follows:-



Media Center Extender Setup cannot create an account for the Extender with ID: uuid:10000000-0000-0000-0200-0025AE2444B5.

Error: The system cannot find the file specified.

Can anyone please please help.

P.S Tried with all Xbox 360 port forwarding set to open for those relevant ports. Certificate deleted. Network services set up correctly. Firewall been turned off. No anti virus enabled. DMZ filtered on xbox both enabled and disabled, IP address are not clashing and im connected wirelessly on both PC and Xbox. Thanks again, please help.