Just an update for Three dongle users - I called into the Three shop in Reading today. They understood the issue of Win 10 updates soaking up data allowances. But they had no solution. It seems that basically outlets like PC World, Currys, John Lewis, et al, simply don't care to research and offer a solution to the hapless purchasers of their Win 10 computers. Indeed they quickly and deliberately changed the subject when I, as a potential customer, broached the subject. And neither do data service providers care like the telcos such as Three. I suppose Win 10 updates soaking up data allowances is good for business so its in nobody's interests to offer a solution to consumers. And every hack that works is very quickly circumvented by Micro$oft - damn them all.