Tried both ......success!!
Jimtherev
We don't think settings have been played with (not by us anyway) but checked power options and help.Seemed all OK but showed us the shut down button is sometimes joined by a an exclamation in a yellow shield to warn that shut down button if pushed will install update then shut down.
Mornington
We tried the forced shut down.
Guys
On next start then normal shut down was available. Thankyou both.
390 and Mrs. 390