Install the driver (FTDI CDM Drivers) for the USB interface.
"Software recognizes the device, but I cannot connect to my car." Solution: This is often due to a software/firmware mismatch. If you are using Firmware 1.67 with software 160115a (designed for 1.60), it will fail. Verify you are using software version 180115a with your 1.67 firmware. Opcom Firmware 1-67 Download
If you see a device claiming to have firmware version 1.70 or higher, it is almost certainly a clone using a fake version number. Such hardware often uses substandard components that can malfunction or become permanently damaged if a genuine firmware flash is attempted. Install the driver (FTDI CDM Drivers) for the USB interface