prolific usb to serial comm port com4 warning

Selecting Properties brings up the EQMOD ASCOM Setup window. When I use CDC and try to connect to the telescope, the Ascom Telescope Chooser pops up and shows me the EQMOD ASCOM HEQ5/6. (I also tried Com1 and Com15, at the default 9600 bps and at the 115200 bps which is what the EQ6R uses.) It does show Port#0002Hub#0001 so naturally I tried com2 on the Ascom driver but it did not work. If I double click on it to get the properties, it shows there is no driver, I tried to update it but it cannot find anything on the Eagle. I am quite sure this is the mount (not the com1 or com15 shown under ports) since when I unplug the mount from the Eagle, this 'USB-Serial Controller D' disappears. When I plug the EQ6R-pro mount into any of the Eagle's USB ports, and use Device Manager to check the serial ports on the Eagle, the mount does not show up as a serial port as I was expecting, it shows up under Other devices as 'USB-Serial Controller D'. I cannot get the Ascom driver to find any serial port to control the mount. NET Framework 4.8 that Platform 6.5 required.Cartes du Ceil is also installed.

I have downloaded to the Eagle3 the Ascom driver, the Ascom Platform 6.5 & the Microsoft. I have a Sky Watcher EQ6R-Pro plugged into a Primaluce Labs' Eagle3, direct via USB.

Prolific usb to serial comm port com4 warning