Open the cabinet above the microwave and unplug the power cord from the outlet.
Pull at each corner of the black plastic grill on the top front of the microwave to remove it. Use a Phillips-head screwdriver to remove the two screws at the bottom edge of the top of the microwave. The screws are 4 inches from each corner.
Open the cabinet above the microwave to access the securing screws while your helper holds the bottom of the microwave.
Remove the three screws securing each of the support brackets with a Phillips-head screwdriver.
Lift the rear of the microwave slightly to unhook it from the rear wall support bracket (the helper will need to do this). As the helper lowers the microwave, push the power cord through the cabinet.
Remove the screws securing the wall bracket to the wall with a Phillips-head screwdriver.