Your solution to download Lightroom from this link worked perfectly: http://www.adobe.com/downloads/updates/
I was able to start the download without getting the error message about the aam protocol not being associated with any program. I didn't have to mess around with the Adobe Application Manager aka Adobe Update Manager or rename the OOBE file. I simply downloaded the Lightroom setup program and ran it. It installed Lightroom without any problems and Lightroom now runs when I click the Lightroom icon.
Thank you so much - the help is greatly appreciated :-)