I went to the latter link that you gave to me and the downloading was quite different that the two previous attempts as the other download link. The download was successful. However, I still received the same message when I tried to open itunesas follows;
"The registry settings used by the itunes drivers for importing and burning CD's and DVD's are missing. This can happen as a result of installing other CD burning software. Reinstall itunes."
Of note, when I clicked the OK button on this message, the itunes player did open thereafter showing all the songs that I had downloaded in the past. It now seems to me that the alert that I am getting really doesn't affect itunes. After sucessfully installing itunes from the link you gave me, I am now able to import songs from a CD that is in my CD drive. If there is a problem somewhere within itunes or my hard drive, I think that I will live with it. I have enough itunes functions to suit me for now. Thanks varjak paw.