Also, how are you trying to update? Choosing Help > Updates?
Thanks for your reply.
I did try that and it gave me the message "Please contact you Administrator if you wish to apply updates on your machine. Updates have been suppressed by the Administrator". I also tried downloading the update and then installing which also gave me the same message. I spoke to our tech guys in the IT department and they said updates etc are not suppressed by them. I downloaded After Effects CC and that seems to be the most up to date version of the application. So I am guessing you can't update the CS6 version you download from the Cloud.
So my problem has been solved by getting After Effect CC but still weird I can't update the CS6 version I downloaded from the cloud.