Further details revealed application was broken and advised to reinstall (which was successful).
This has never, ever happened before in years of using KIS.
As it happened simultaneously with the 365 update it's hard to believe it was a coincidence.
Has it been reported before? Is it a bug? Is it malware?
Best answer by rufford155
Yes, as stated in original posts, all was OK after reinstall and updating - or at least the problem has not happened since.
I only posted this really to ask if there was a clash between Ofice 365 and KIS, to which the answer appeared to be “YES” - or at least it was at the time (nearly a year ago now).
Since then both laptops have updated successfully to the 2020 version, after accepting the recommendation that came in notifications.
By the way, this is a much better system for updates.
The UK version is now 22.214.171.124(i) but I am not sure of the patch for the one abroad as I am prevented from travelling to it !