Turn the power off, to the outlet to be changed, at the main circuit panel.
Remove the screws holding the outlet cover and outlet onto the electrical box, using the screwdriver.
Loosen the screws, with the screwdriver, holding the wiring to the outlet, and remove the outlet.
Connect the GFCI outlet to the wiring, using the screwdriver and the following connections.
Connect the black (hot) wire to the bottom brass screw labeled "LINE." Connect the white (neutral) wire to the bottom silver screw labeled "LINE." Connect the bare (ground) copper wire to the green screw.
Tighten each screw to a snug fit.
Push the wiring and outlet into the box. Using the screwdriver and included screws in the kit, affix the GFCI outlet to the outlet box. Attach the cover plate over the outlet box with an included screw.
Turn the power back on at the main circuit panel.