Open your cabinet doors directly over your attached microwave oven to expose the power cord. Unplug the power cord before attempting to detach the appliance.
Tape the door shut with duct tape, then locate the retaining bolts in the bottom of the cabinet above your attached microwave.
Ask your assistant to hold the underside of your attached microwave.
Unfasten and remove the retaining bolts going through the bottom of the cabinet into the appliance using pliers or a wrench. The appliance should be detached and can be pulled out of the recess under the cabinet. Place the bolts in a sandwich bag.