Thanks polonus, in middle of reading your explanation I remembered what you're talking about (though I don't have it, I've seen a screenshot of it around before).
I won't be upgrading this slow computer to W10 anyway, so a restore point will do for the purposes of this discussion, though I'll wait on installing these System Update Readiness Tools, maybe once the one from the year 2000 appears (at the rate they're appearing
) I'll consider installing the old Readiness Tools
.