unable to build lighting


I have just downloaded UE4 via the launcher and going through the basic starter packages

When I try to build the lighting, it fails straight away.

I have checked the swarm agent log and it gives this.

09:41:16: [Connection] Detected new local connection from same process ID as an existing one, closing the old one
09:41:16: [CloseConnection] Closing connection 4606042D using handle 4606042D
09:41:16: [CloseConnection] Connection confirmed for disconnection 4606042D
09:41:16: [CloseConnection] Closing orphaned Job ()
09:41:16: [CloseConnection] Connection disconnected 4606042D
09:41:16: [GetMessage] Safely returning to 4606042D with no message
09:41:16: [Interface:TryOpenConnection] Local connection established
09:41:16: [Interface:OpenJob] Error: The service cannot be started, either because it is disabled or because it has no enabled devices associated with it. (Exception from HRESULT: 0x80070422) 09:41:16: [MaintainConnections] Local connection has closed (4606042D)
09:41:16: [MaintainConnections] Removed connection 4606042D

any idea how to fix this ???