I used the method to Remove PIN - very vague as having gone through the steps the message about PIN being recommended is still there! So it looks as if nothing has actually changed!
Then I went back to netplwiz and the box was still unchecked, so again, it looked as if nothing had changed!
To be on the safe side I checked the box and then unchecked it again so that the Apply box came back. Then the login box came back and I used the MS name and password.
Switched off, switched on again, and it logged me in without using password or PIN - Hurrah!
Thanks for advice, but what a muddled system!
As a footnote - it is very necessary to be able to get the PC working without knowing the login details, or PIN. Take me for example. If thre comes a time when I am incapacitated in some way, my granddaughter will need access to my computer and all its files for such data as bank account, medicine ordering and medical help etc. Online hopping account too of course.
Years ago I showed her where the power switch is and my Excel sheet with about 105 rows of email and other account information. That is all she would need to get started. The only sure way for her to actually use a Windows login code would be to write it down on a Post It stuck to the monitor!
MS frequently send messages about security and not writing passwords etc down anywhere! In an emergency that just ain't sensible
Tony