Since my original question was mysteriously solved, apparently by simply rebooting my PC, I've gone ahead and clicked the "Mark Solved" button.

Of course I've still got a gazillion questions about how to penetrate the arcane facade of Windows 10, so I'm sure I'll be coming back here often in the days to come.

I appreciate your generosity in sharing your time and expertise with me so I can get up and running with Windows 10.

Will in Seattle
a.k.a. "Clueless"