How to Print PRN Files to a Virtual USB Printer Port

Log in to your server and click 'Start,' 'Control Panel,' 'Printers.'
Click 'File,' then 'Printer Properties,' then click the 'Virtual Printers' tab.
Right-click on the virtual USB printer port that you want to print PRN files to.
Click 'Advanced Properties,' then check the 'PRN Compatibility' box, then click 'OK' two times.