Microcom 428TM Operator's Manual page 28

Getting Started Chapter 3
Click "Continue Anyway" if this dialog box pops up.
The next step is to install the FTDI USB driver. While this is a communication port (RS-232)
emulator, no configuration of the RS-232 port is required.
Once installed, the FTDI USB device will show up as a USB SERIAL PORT (COM) listed
under the "COMM PORTS AND LPT" within Device Manager. The "x" indicates the COMM
port number this will be used for that USB port connection to the printer.
Connect the power cable and the USB cable to the printer and turn the printer on. The FTDI
USB device should try to install. If it is unable to install, please manually install the by
following the example below.
Select YES to install the communications driver.
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