Test of Manual Installation of SDR# as suggested by
dickie757:
I downloaded the two indicated files in a new SDR# folder and checked what driver was in the Device Manager. The other Zadig file was automatically inserted by the software; I didn't do that.
It was necessary for me to remove the checkmark to find the device:
Modify Driver:
Device listed as USB Device in Device Manager:
CONCLUSION:
I was able to do the Manual Installation, but it was quite tedious. I think it is excellent as a backup if no other way will work, but it is probably too difficult for a beginner. A beginner is better off doing the installation as suggested in the manual, which is to click on install-rtlsdr when connected to the internet. This will download and install two necessary files.
My thanks to deadite66 and dickie757 for helpful suggestions.