Eastern Car Care in East Los Angeles had a problem:  Their gas station management software just stopped opening.  Mysteriously they received a message that a file named NmMulti.inf was missing the same day.  It didnt take long to figure out that their parallel port was to blame and sure enough the dreaded (sometimes) yellow exclamation point showed up under device manager.  After searching and downloading the correct drivers (three attempts later), the parallel port was working but the TSW program still would not open.  It was then that I realized that the parallel port had a dongle hooked up to it that was preventing the program from opening.  Luckily a simple reboot after installing the new parellel port drives did the trick and PC Fixer managed to be a hero in the Los Angeles Computer... --