Can't (fully) change foldernames

Windows 10
I have inherited some files in several folders. I need to change the foldernames.

I have changed the foldernames in the usual way (F2). But when I copy or move the folders elsewhere (to the same or other partition/drive) the resultant folder reverts to the old foldername.

The original folders (the ones I inherited and then "renamed") display my New folder names in the regular folder views; and also in the Properties>General tab. However, under the Properties>Security tab, the "Object name" is listed as a path statement which includes the OLD Foldernames. I assume that this is the root of my problem. How can I change the Object name?

thanks




for info:

Windows10 Home 1709

Read-only attributes:
For the FILES inside the folders: The Read-only attributes checkbox is unchecked
The folder itself: The Read only attributes checkbox has a small solid black square inside the checkbox. The label to the right of the checkbox says "Read-only (Only applies to files in folder)". If I click this twice (to make the box unchecked) and then commit to the changes; when I come back to the folder it is back in the same condition.

Permissions on the folders are:
Adminstrators: Full control; Modify; Read&Execute; List Folder Contents; Read;Write;
Users: was Modify; Read&Execute; List Folder Contents, Read. But I have modifed it to also include Full Control and Write.

I am the only user on this machine an I login with Admin privs by default.

I haven't had any similar problems for the last, well, 20 years.


edit:
I notice that someone else is having a similar problem here: Folder name change does not take - Windows 10 Forums

Not sure whether it is an identical cause or not. (edit : it now looks like it is a different cause)

My last updates to Windows 10 were: Features: v1709 (6 weeks ago) and Qualty: KB4058043 on 17 December

Hardware: Lenovo Yogo 2 Pro laptop.