Many thanks Beags; I'll give that a try, though in the majority of contacts between me and assorted would-be downloads there is either a question which totally flummoxes me, or else when the download seems to have ended it has then vanished somewhere in the imponderable innards of my computer.
The concept of "If it ain't bust, don't fix it" seems to have evaded Microsoft. However, I'll think positive, cross fingers and get stuck in.