Virtual Serial Port Driver 9x - Version 2.0 Virtual Serial Ports Driver (VSPD) is a Windows device driver. Using it you can create two virtual serial COM ports in your system which will be virtually connected to each other. For example, after installing VSPD, you will have Virtual Serial Port COM5 and Virtual Serial Port COM6 added to your system. These ports will behave like real common serial ports to other Windows applications. These ports will not interact with any hardware.