I seem to have worked around this by clicking 'Quit', which took me to the 'Try' desktop; then clicking 'Install' again, and this time not clicking either of the 'download stuff during installation' options.
I seem to have worked around this by clicking 'Quit', which took me to the 'Try' desktop;
then clicking 'Install' again, and this time not clicking either of the
'download stuff during installation' options.