I've been trying this for three weeks, when I paid my CC subscription.
I download the CC desktop, run it (as admin) and get error code A12E5. That's it.
Since a lot of people seem to have the same or similar problems with their paid product I read some other threads and tried using the Adobe Application Manager, as suggested, but then it just says "Contact support." It seems this forum is Adobe's support, so here I am.
Windows7 64BIT Pro. I have CS5 Design Premium installed.
Needless to say, I won't renew my subscription next week unless this can be solved.