Sandy, I found it.
I decided to do a search on the hardware ID of the unknown USB device. This is found in Device Manager, Properties of unknown device, Details tab, then select Hardware IDs in the dropdown. In this case the first of two hardware IDs was USB\Vid_0d60&Pid_0002&Rev_0001.
A Google search on that hardware ID came back with one single hit to a page on www.yourpcdrivers.com
. (Yay Google!)
That page held a link to an application that, once installed, would scan your machine's hardware and provide recommendations on finding and updating any device drivers.
I was skeptical but I downloaded it and installed it.
I launched the installed application and initiated the scan. In about a minute it returned the list. The unknown usb device was listed at the top of the page with a recommended driver by IVL Technologies that included a link to that driver.
That linked page listed a driver named "handheld karaoke", with a link to the executable Handheld_Karaoke_v6.0.2.exe.
It was a self-extracting WinZip file that contained two applications, one was Karaoke Manager and the other was a device driver.
It worked. I can plug in the Karaoke Mic and launch the Karaoke Manager application to connect to it.
The Karaoke Manager app (dated May 22, 2003) still looks to connect to a site that's no longer in existence but I expected that.
I was anticipating that once I had the proper driver installed I could browse the contents of the karaoke mic in Windows Explorer as if it were a logical drive. It's not. It's another usb peripheral that only Karaoke Manager understands.
I think they were following Apple's lead when they designed this one.
I learned two things, forum.
One: You can find drivers by hardware ID.
Two: Don't try to resurrect the functionality of an old On-Key Karaoke Mic.