Unplug the Kenmore's power cord from the outlet inside the cabinet above the appliance.
Remove the screws and washers from the inside bottom of the cabinet over the Kenmore using a screwdriver, while your helper holds the appliance from below.
Push upward on the bottom of the microwave to disengage the metal prongs on the back from the support bracket bolted into the wall.
Lower the appliance to the countertop or the cooled surface of a range, if your microwave is over a cooktop.
Guide the plug on the end of the power cord downward through the hole in the cabinet to release the cord. You can now remove the microwave for repairs or replacement.