Marion, Alan et al.

Many thanks for all your suggestions.

What eventually appears to have made everything run as smooth as silk is to just disregard Zadig and let Windows install a driver.

The dongle appears as Bulk-In, Interface (Interface 0) in Device Manager and the driver provider as libusbx.org.

If I then run Zadig and let it overwrite Windows’ offering, the dongle appears as Bulk-In, Interface (Interface 0) (Interface 0) and the driver provider again as
libusbx.org…

Having installed the Zadig driver over the Windows one nothing appears to have changed â€" SDR# still appears to run properly.

SO, the above begs the question â€" do I just let Windows do its own thing and leave things at that (shades of if it ain’t broken don’t try and mend it…) or should I then install Zadig afterwards?

Hopefully the above will work on my other pc, I’ll find out later this evening.

Thanks again for all your help and encouragement.

Mike - I know my XP Pro MCE is well past its sell time… I tried W7 (both the grandkids have it on their laptops) but I could never get used to it. Having retired fifteen years ago I suppose I’m getting a bit long in the tooth to try new things â€" apart maybe from SDR - so I stick to things I know and understand â€" well understand ‘reasonably' well!! If and when this old Dell dies I’ll maybe take the plunge…

Thanks guys.