Windows 10 does not recognise connected Kobo Touch

I'm new to e-readers. I've installed Kobo Desktop, Adobe DE and Calibre, none of which sees the device. I turned off wi-fi on the Touch, connected it to my laptop using various cables and sockets and, when the Touch requests it, pressed Connect. The Touch screen goes black with 'Connected and charging' displayed. Windows does not see the device in Explorer. I contacted Kobo support, but they asked me to contact Microsoft to obtain a USB driver of some unspecified type. I don't think he had any idea what to suggest.

This is my second Kobo Touch, both of which had the same problem.