I posted in the "installation failed" posts how using "run as administrator" enabled Logos 6.5 SR-1 to succeed in installing itself. Windows 10 is very security conscious and this option appears to be a way to overcome any block Win 10 uses when loading Logos 6 normally - even if you are the administrator as I am. It was established when installing the OS.
Right click on the Logos 6 icon, select "run as administrator" and the installation went smoothly. When I needed to restart Logos 6 to complete the install I repeated the "run as administrator" and the installation completed perfectly to SR-1.