OK, first the bad news: I disabled AntiVirus and firewall, ran V2D3Plus Driver .exe, and rebooted. As soon as I plugged in the capture device, Windows Update started to install the drivers, with the same result as every previous time.
Now, the good news: I decided to try something different. I deleted the drivers, rebooted, turned off AV and firewall, and put the Roxio disk into the drive, choosing "Repair." It went through the entire process and told me to reboot, which I did. After turning the firewall and AV back on, I plugged in the capture device. Windows update started immediately BUT this time it installed both drivers successfully!!!!!!
I wish I understood it better, but something you had me do allowed the repair process to work (that was one of the first things I had tried, remember?). I hope to be able to find the correct drivers for those USB controllers, but I'm assuming the generic ones will work ok. At any rate, the capture device is now functional!
I can't really express how grateful to you I am (as well as others who responded) for your expertise and patience, and your willingness spend so much time with me. I moderated on a similar forum for a number of years (alarm systems, not computers). I helped quite a few people, although I had a mere 6,000 posts (a slacker compared to you!!). There were cases where I went back and forth with someone for days, just as you've done with me, so I know how time consuming and often frustrating it is. It makes me all the more appreciative of what you have done for me. So thank you, thank you, thank you.
Very warm wishes for the Holiday Season and a wonderful new year!