Abstract: A device and method for deterring the theft of personal computers having an unused serial or parallel port. An eyelet bolt is screwed into each of the threaded apertures adjacent the unused port and the eyelets are then secured to some relatively immovable object by a chain or steel cable. The chain or steel cable may simply pass through the eyelets or may be secured to the eyelets with a padlock, in either case preventing the eyelets from rotating and being removed from the computer. The opposite end of the cable or chain may simply be wrapped around the immovable object or locked to it as by a second pair of eyelets screwed into the lower surface of the computer desk.