The Computer is docked and only battery power is detected. This can happen if the adapter is missing, the power cord is unplugged, or the computer is not properly connected to the docking station.
You should undock, redock, attach a power adapter, or plug in the power cord.

Strike the F1 key to shutdown

what can be done to rectifier this

and secondly l took it to a dell shop they said am on Pro - support

which email should l send my complain to ?