I went through a period where I am notified of a need to update an adobe product, usually flash and go through a loop of an install page and the home page; I was unable to update the tools.
I finally checked the Ghostery report, and paused the blocking since one of the objects blocked came from Adobe. This then allowed the download page to display the McAfee spamware opt-out check box and it all works properly. Mozilla Firefox is my default browser; I have installed ghostery