So, I have now tried 2.92, 1.93 and 1.95 and they all fail in exactly the same place - after formatting and partitioning, and as the open source software is about to be installed. (It hangs at 0%.)
!.81 installs on the same system with no difficulty. Does anyone have any suggestions at all as to what I might be able to try that might get the install past this stage?
As I said before, it worries me a little that just as it starts the hardware detection a message flashes at the bottom of the screen saying something failed - but of course it does not stay around long enough to see what it is. This happens with 1.95 as well.