Grizzly Thanks! I think I realize what was causing this recent problem with the Intel Management Engineering Interface update. When Windows 10 was first released, I seem to recall that many users were having many problems with driver updates, the Forum was flooded with help requests. At that time I stopped driver updates using the LGPE. When 1803 was released, I performed a clean install on all of my Dell PC's. A clean install would have reset the LGPE "Do not include drivers with Windows updates" back to its default value, this is when I started having a problem with the above mentioned driver update.
Thanks to all for the help at resolving the driver download error.