You can activate the CC license on only 2 machines with the same adobe ID.
Activating it on more than 2 will give you an error.
If you are getting any specific error message, please specify.
I had on two computers, my work Pc and Laptop running CC and apps. . Deactivated one license on laptop since I purchased new Windows 8 machine.. I installed CC on a the new PC which works fine. .
Tried to set CC back up on old work PC which I used before the new Windows PC and get message "can't get to Adobe server". Popup window asks to renew. I previously had CC and apps on the work PC and want to use it again since I cancelled the laptop CC and apps. Do I make sense?