Further to my own post above, I found recent changes to Windows 10 networking (courtesy of Microsoft's updates) and removal of HomeGroup (which I never used) has caused some issues for connected devices.
All my existing network connections have worked fine on the Q10Pro and still do.
It was when I tried to connect a new 8Tb WD Cloud Home to the network and system that the device could not be seen properly under Windows File Explorer (WD does provide a Discovery Tool that locate it on Windows and allocates a drive letter until the PC is rebooted).
On the Q10Pro, SMB network was throwing up "error" messages.
It appears that by default now, Windows Network Discovery Functions are turned off and should be changed to Auto Start:
https://windowsunplugged.blog/2018/03/27/network-computers-no-longer-present-in-file-explorer-on-windows-10-1803/
I was able to log into my WD Cloud Home (Public Folder) from the Q10Pro and it all works now (including Kodi library)
