Unplug the microwave. The outlet is in the cabinet above the microwave.
Ask a helper to place his hands under the microwave to stabilize it.
Turn the screwdriver counter-clockwise to remove the screws from inside the cabinet. Turn the screws until they are completely disengaged from the holes in the top of the microwave.
Pull the screws upward and out of the cabinet and set them aside.
Ask your helper to slightly drop his hands so that the front of the microwave leans down and forward.
Place your hands at the back of the bottom of the microwave so that they are next to the wall.
Press upward to remove the microwave from the wall mount slots. For best results, press with one hand and stabilize the microwave with the other hand.
Set the microwave aside.