Close the door. While it's possible to remove a swing bar door guard with the door open, closing the door gives you something to brace against – making the removal process easier.
Fit the screwdriver into the screws holding the peg portion of the swing bar door guard to the door. Turn the screwdriver counterclockwise to loosen each screw.
Pull each screw out of the holes on the peg side of the swing bar door guard. The metal peg portion of the door guard will fall away from the door once your remove both screws.
Unscrew each screw that attaches the slide bar to the door frame. Remove the slide bar.