Aloha Pat,
Can't means several unsuccesfull attempts to download from the adobe site at http://helpx.adobe.com/x-productkb/multi/library-functional-content-mi ssing.html
my unzip programs are 1) the imbedded browser program within OS WIN7 & Firefox, 2) 7zip.
I don't use a download manager and just learned about Akamai from the reply by kglad, however, all of my downloads have been from Adobe and according to the url provided by kglad, I should aoutomatically recieve a copy of Akamai Download Manager along with my Adobe downloads, and that has not been my experience thus far.
Mahalo-n-aloha...konadon