Thanks Jesper, I had read teh "Read Before" thread first, but there no error messages beyond a Windows (10) message saying the application has stopped working.
I'll see if I can find later openGL drivers than the ones installed to at least remove that possibility.
I think I have checked for release/debug version issues, but accept there might still be residual stuff messing things up. I plan to try a new install on an old Windows 7 box which has otherwise not seen VS/SFML before, but want to be sure first that what I'm trying to do should work as well as the initial worked example. If I've done something to mess up the install I want to try and avoid making similar miostakes on the clean installation.