I am now retrying all of the steps you listed above again, although I don't know if that's going to help.
I have now tried all of the suggested steps at least twice.
The only instance of seemingly achieving any progress was the first time I performed a clean boot, when the wifi connection actually worked. But after that, I tried following the steps to isolate the problem and then after restarting the computer, all of my wireless features have disappeared again. I have tried repeating the entire sequence of steps again, but the wifi hasn't worked again. It just worked that one time, but I don't know why it was different that time.
I have been trying to fix this for over 11 hours, but haven't been able to connect back to wifi.
I would like to know if rolling back the Windows Update is an option and, if so, how to do that and how to prevent Windows from updating again.