> I am the 'Administrator' and don't understand why I am getting this error.
That message has nothing to do with whether you have administrator privlieges for your computer.
That message is telling you that whoever deployed your Adobe software as part of an enterprise deployment disabled the ability to install updates. This is something that you need to work out with the IT person who configured and deployed your volume-licensed Adobe software.
I don't understand what you mean. I installed the software on my work computer and I am having this issue on my laptop. There is absolutely no one else involved in this process at all, I purchased the software, I downloaded it both on my work computer (iMac) and my Macbook Pro. Until I installed OS Mavericks on my Macbook I had no problems.
Then there has been some problem with your installation, since the message that you're getting has the meaning that I described.
Rather than try to solve this question over a forum, I strongly recommend that you contact Adobe Technical Support to get it worked out:
This forum is monitored by folks (like me) who know the details of After Effects, not how the installation/activation process might go awry.
Could I just ask if there is a direct link to download the whole of After Effects 12.1? Rather than using CCD?