Well, I don't even know why I bothered driving over to the Apple store on this hot (107 degrees) afternoon. At least it wasn't all that far. The t-shirt I talked to was eager to blame the problem on Microsoft (big surprise there!) and told me we'd have to wait until there is an update (he was a little unspecific as to who was going to do the updating) that would enable iTunes to see iPods under Windows 10.
Let's sum up for a minute here: Yesterday, I went to the Scottsdale mall, where I wandered into the Microsoft store. The Microsoft t-shirt was willing to blame Apple for the issue, and even thought maybe the fact of an iPod's age might have something to do with it. [mzdov's new iPod eliminated that line of inquiry] Today I went to the Biltmore mall and walked into the Apple store, where the t-shirt said they get Windows 10 issues every day [even though he said he kinda likes it.] But the bottom line is we will need to wait until either a zillion users raise a high stink about this problem, or Apple issues a regular update that fixes the issue as a matter of course.
Me, I'm more or less glad I: a) have my iPod pretty well loaded with a good stock of tunes and b) have a laptop still running Windows 7 where I can load tunes from if I absolutely, positively MUST have particular sounds during the interim.
So far, I guess that's about it. I've tried all I can think of - the "run as administrator" / the iPod reset / the computer restart / computer cold boot etc. I'd go into my old DOS bag of tricks and wave a dead chicken in the air if I had any hope THAT might work. I will remain on alert.
-- Jack in Phoenix.