Turn off the power to the Hampton Bay Windward II fan. Allow time for the blades to stop rotating before removing the glass shade.
Position a step stool under the ceiling fan. If the existing shade is cracked, put on a pair of leather gloves and eye goggles to protect your hands and eyes.
Push up on the center of the glass shade slightly, and turn the shade counterclockwise. The shade unscrews from the Hampton Bay fixture with only two revolutions.
Take the glass shade to the store to match the inside circumference with a new shade. The glass shades for ceiling fans are in the same section as the lighting fixtures.
Line up the notches on the new glass shade with the ridge on the inside of the fixture. Push the glass shade into the fixture and twist it clockwise until it is hand-tight. Turn the power back on to the Hampton Bay Windward II fan.