You asked, "What system did you get the driver to work on?"
The laptop is an older Lenovo (IBM) with Windows 7 Professional operating system. The club layout uses NCE systems, including a Powercab / USB interface for the programming track. I have yet to test if the just re-installed NCE Silabs driver is now conflicting with the QSI Silabs driver.
It seems the QSI Silabs driver must be installed first. So far so good.