Jim - The DAC at the link you found is not it; it is the 1050. Not a wireless. I don't know if it is USB to Ethernet. Doesn't seem to be, but I'm not sure I know even how to tell. I think it is simply considered a USB dac.
Yes, it works on the desktop. I just plug the NAD into a USB, and it takes over the desktop sound. However, it simply won't do the same thing on the laptop -- doesn't work at all. No signal from the laptop to the dac.
Yet both the desktop and the laptop are Windows 10, same latest version, 1803.
I can't tell how many bits the NAD is. Making sure that all are 32 or 64 is something I don't know how to do.
After a point, I agree that this is NAD's problem. NAD did have driver software for the 1050, but it apparently doesn't work with Windows 10 (so the forums say -- and I couldn't download it successfully). But for 1050, v. 1803, it is said that you don't need the NAD driver software. It is said that the 1803 version supplies USB 2 automatically, and in that way runs the DAC. And, indeed, this seems to be true on the desktop. But not on the laptop.
DJLegma - I'm sorry, but what does it mean to be "powered up with the USB input selected before the computer boots." On the desktop, I don't "select" anything. I just plug in the DAC, and it takes over by itself. In other words, Windows 10 v. 1803 seems to sense that the DAC has been plugged in, and automatically sends it a USB2 signal, while at the same time shutting down the output to my little desktop speakers (which I think are just plugged into a headphone-type jack).
You guys are great to try to help. Perhaps you can get a glimpse here of what it is like to be a passionate music lover who would really like to tinker with computer audio, because of all of the potential it offers, but becomes absolutely overwhelmed with a 2001-like monolith of technology that is close to impenetrable for a little guy like me. I am/was a musician who knows something about notes on a page and what good recording mics can do for my voice, etc., but this is simply Balkan to me. I've been working on it, in pieces, for a year. I work some, hit a wall and give up, come back in a couple of months and try again, hit another wall, etc., etc. I may have to slink back into my hovel again for a while now (though I'm going to push myself to hack away a bit more). (Thus far, by the way, NAD has failed to respond to my email requests for help - or if they did, I can't find the response anywhere.)
Again, you guys are great. Thank you!! Earl