There are no special drivers required.
Well there are but these get installed when you install RailPro Assistant.
Jim, just to make sure we're all on the same page, the two screen captures below outline RPA when the HC is detected and connected and when it isn't.
RPA with HC NOT detected (The HC might physically be connected to your pc but RPA can't see it.)
RPA with HC detected and connected.
If you get the second screen (which is sounds that you are not) then all I can really suggest is to keep trying and see what Tim Ring has to say.
If you get the first screen then read on. Firstly we have to determine a couple of things.
1. Are your running 32bit or 64bit Windows 10? (this can make a difference to the drivers)
2. Does your PC have USB 3 ports? (this definitely can make a difference).
First we'll check if Windows has even detected the HC. Please go to
http://www.nirsoft.net/utils/usb_devices_view.html and download the appropriate version (x32 or x64, link is near the bottom of the page) of USB Device View. It is freeware and does not need to be installed; just unzip it and run it.
With your HC plugged in and turned on have a look for FT232R USB UART in the Device Name column, this should be your HC-2b (I am guessing that the HC-2b shows up the same as a HC-2). If it is not there then Windows is not seeing your HC.
If it is there it should look like this in USB Device View (the green "light " and green highlighting tell you that it is connected and turned on):
If it is there right click anywhere on the line that is your HC and select properties from the menu. I'd like you to take a screen capture (press ALT and Print Screen together). Paste the capture into MS Paint or similar, save it and post the image here.
If it is not there then we'll work on that when you get back to us.
- Tim (not from RE).