Remove the handle from the lockset. Press a stiff wire (a jumbo sized paperclip works well) into the small hole on the side of the knob or lever. Pull off the knob or lever.
Remove the rosette from the door. Remove the two Phillips head screws securing the rosette. Pull the lockset from the door. Some models require that the rosette be pried off using a screwdriver (a slot is provided for that purpose) before removing the screws.
Remove the two screws securing the lock's bolt to the edge of the door. Pull the bolt from the door.