How to Set Up a Virtual COM Port Driver in Windows How to Setup a Virtual COM Port Driver Using a Virtual COM Port Driver Many programs (including ) work best with printers with serial interfaces. Canon Ws 1200h Manual Woodworkers. If you don't have a serial connection on your computer or only have a printer with a USB connection you can still use the program by installing the Epson Virtual COM port driver in Windows. This creates a virtual COM port USB option on the Windows computer which you can then use in the program with your USB printer. Our example uses uniCenta, a popular Open Source POS application. Download Hp Officejet K7103 Printer Driver Windows 7. Steps: • Install USB printer in Windows • Install Virtual COM Port driver in Windows • Select a COM port to use in the Epson TM Virtual Port Assignment Tool • Configure application to use the virtual COM port just created. Connecting your Epson USB printer Within uniCenta there is native support for printers with serial interfaces. If your computer does not have a serial port you can install a USB printer then add a virtual serial port in Windows for the program to use.