Jim, thank you for your response.
I believe I followed your instructions. #1-I went to desktop shortcut and opened the unlock window. I entered all the needed data and pressed unlock. I did get a notice, which I had gotten many times before, about the registration data being invalid, etc, and that it would continue in the read-only mode. And it did opening the read-only mode.
#2- I went to the shortcut again, right clicked to get the run as administrator and clicked to do so.I then get a MS notice about changes to the system which I click yes through and the the unlock window comes up and I enter the data and get the same result as #1.
As far as the registration information goes, I believe it is correct. My name or spelling has not change, the email address is the same as I have always used. The SN is the only place there might have been a change, but i doubt it as I have used to open this account many times and even before the re installment. I am 98% comfortable with the SN.
I am glad to know that reinstalling is not necessary. A walk on hot coals is preferable.