After 2 calls to NetFlix with no solutios and 1 call to Apple with a solution which fixed the login and password with Netflix completely. Apple very carefully guided me through resetting the WiFi channels to correct potential interference with other neigborhood WiFis.
This fix is very specific to ones neigborhood. The thing I learned that most should know about is the power of the System Information under About This Mac. Once in the System Information, go down the list to Wi-Fi and click it. It may take a few seconds, but your Mac see all your neigboring Wi-Fis, even the very weak signals and reports the Signal / Noise (S/N) of each. I was flabergased by this encreadible list of 14 WiFis close by.
Apple had me read the Channel of these and the S/N and then had me change the channel of my 2 WiFi Networks on my Airport Extreme. This worked!