by Sarthak Singhal
I am seeing multiple folks reporting the issue of update failing to install on their machines. To get a speedy answer to your queries and a resolution, I would recommend you to follow the thread at Adobe forums linked at http://forums.adobe.com/message/1956471.
The thread is being followed by people from the installer team as well and you can get your queries resolved sooner than on my blog. I try to be active in that forum as well but somewhat get restricted by solving the issues of core product functionality and features.