Welcome to the forum.
This article is a very general checklist for installing most Adobe programs. Look over it, and make sure that you are doing everything listed. A lot of other software can get in the way of an installation, like anti-virus or anti-malware applications: http://forums.adobe.com/message/3419692#3419692
You're the second person with that problem this month. I think the other user went to Adobe support chat and they fixed it. I can't recall if a reason / cure was ever reported in the forum.
Insanity is hereditary, you get it from your children.
Adding to what Neale said... some links
Help for Download & Install & Setup & Activation