Yes, thanks @cyberdiva, I think I should heed that advice too! I shall have to switch off auto-update first though. Bother. I thought that was such a good idea too - manually invoking an update seems so passé in this day and age. How was one to know know that MS would feed bad output into the auto-update? Maybe I've led a charmed life, but I don't recall them ever doing that before and advising you how to manually uninstall the update, and then sending out another buggy update to fix the former (as seems likely).
Maybe they lost the page in the ITIL Change Management manual where it talks about staged testing and then release...putting ßs out into live production is so 1980s.