Believe it or not - I've just returned to Win8.1!
Installed Win10 - but found that when I tried to run MS Money Plus (I know, I know) it said I needed Internet Explorer 6! Further, the password manager I've only recently installed, and was v happy with, it got fouled up by Win 10 big time.
The moral is that I shouldn't have rushed to follow the mega-strong recommendation from ComputerActive mag.
Or, to quote the ancients:
SI NON FRANGITUR, QUIA NON EMENDATUR