Hey! I finally got it to work. What worked for me was finding the correct camera to update. Under Cameras in Device Manager I only saw 1 camera which I updated but it didn't work. This time I checked Imaging Devices and found the IR camera. THAT one needed updating. I restarted and it I could set up my facial recognition; upon restarting again, it worked! Interesting, though, that the IR camera is not found under Imaging devices now; it is under Cameras. So much work to get this working again!
Thanks for having me look once more at things I had looked at before. Third (fourth....tenth) time is the charm!