SOLVED
This was helpful. I'll add that I also had difficulty removing the first installation of the printer driver (mine was not a Canon model but a third party thermal USB printer). The old problems with Windows 10 not giving pc owners administrator powers have not been resolved by Microsoft. Now they have "System" access that gets denied. Why Microsoft can't just let people manage their own equipment blows my mind. Link below to a video on using Powershell to force driver removal. Note: his instructions are running from C:/ whereas my CMD screen was sitting at C:/System32 but that actually was right because that's the drive the printer drivers were in.
https://youtu.be/HWqmI0HiAWY?feature=shared
With the advice above, after running ALL updates (there were several), I then used the Add Device installation process to add my printer again (while it was plugged in and powered on) and I'm now functioning. ONLY TOOK A WHOLE DAY TO SORT OUT MICROSOFT!!!!