I'll try running DW in Win 7 Compatibility mode and see what happens. .
Update -- no joy. Running PHP, MySQL, Apache & DW in Win 7 Compatibility mode. Still have the issue.
I'm making an image of my C; Drive and going to try the Win10 System repair.. .
Update 2: Installed WAMP -- solved the problem. I would have been pissed if I had to go to CC!!