I followed that link.
It appears to do nothing at all.
Yes, the box is unchecked.
I also tried "Apply" (which isn't mentioned in that link) which brings up the prompt to enter password twice.
It allows a blank entry, but login still requires a password.
Tried simply changing my password, but login still requires old password.
As an aside....
What's the point in having a weblink on the login screen "If you forget your password?" Can't get online to follow that link, anyway.
And, another aside....
The link mentions "Windows Key + R". Why is stuff like that hidden? Run used to be on the start menu. Now I have to use a keyboard combination which I've only discovered accidentally (since the start menu also has no "help" option.)
Meh. Sorry. Rambling, and very frustrated. Windows 10 has been VERY annoying.