Cloud License allows 2 activations http://www.adobe.com/legal/licenses-terms.html
-Install on a 2nd computer http://forums.adobe.com/thread/1452292?tstart=0
-Windows or Mac does not matter... 2 on the same operating system, or 1 on each
-Both computer Cloud subscriptions may not be in use at the same time
The Email that is registered with Forum does not have any CC attached to it. Please let me know the email to which it is attached in private so that I can let you know the number of activation you have availed till now.