Thank you for taking the time to reply. Let me begin by reiterating that this is not a problem I am having with a printer that is currently installed in the system; it started out that way, but it's become a different problem. It's not just that I can't reinstall the problem printer - I can't install any printer.
Anyway, here's a rundown of the results of your suggested remedies:
Option 1 - I can't really say what the final results of this step are. I started the troubleshooter about 15 minutes ago, and it seems to be hung up on "Checking the Spooler service..."
Option 2 - There is no Print queue listed for the printer in question, which is not surprising, since (as mentioned in my OP) I uninstalled the printer.
Option 3 - There was one Cumulative Update available since my OP. I installed it, restarted, and still have the problem.
As for the suggested support link, I had pretty much completed the first 2½ steps on my own (as detailed in my OP):
Step 1 Unplug and restart your printer - check
Step 2 Check cables or wireless connection - My computer is connected to my home network, I can print to my other printer, so the computer to network connection is OK. My other computers can print to the "problem" printer, so the printer to network connection is also OK.
Step 3 Uninstall and reinstall your printer - This is the crux of the problem. I had no problem uninstalling the printer; the problem is I can't reinstall it. From the support link (BTW, this link ins for Windows 10, so there are some minor differences):
Reinstall a wireless printer
- Select the Start button, then select Settings > Devices > Printers & scanners.
Open Printers & scanners settings
- Select Add a printer or scanner. Wait for your device to find nearby printers, choose the one you want, and then select Add device.
For that matter, I can't install any printer because the "Add device" button does nothing but hang up the settings window. (Notice the dimmed-out "Add device" button.)