Look for an entry named or FTDI USB Serial Port (COMx) .

: Once the driver is active, the cable is used with software such as Leica Geo Office (LGO) Leica Captivate to initiate data downloads or instrument updates. Benefits in the Field Reliability

Uninstall the old driver (see above) → Reboot → Install new driver → Reboot again. Do not simply overlay.

- Try a different USB port (preferably a USB 2.0 port rather than a USB 3.0/3.1 port).

The GEV189 is a proprietary USB data cable manufactured for Leica Geosystems (often referred to as the "Abotron GEV189" in manuals). It features a standard USB-A connector on one end for the computer and a specialized LEMO-0 connector on the other, which attaches to the serial port of a compatible Leica total station.

Leica GEV189 (734700) is a specialized USB data transfer cable used to connect Leica total stations, digital levels, and theodolites to a computer

The driver is typically optimized for Windows 7 and 8 , though some versions now support Windows 10 .