Chat Now button near the bottom for Activation and Deactivation problems may help
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
-Remove license on a computer http://forums.adobe.com/thread/1442423?tstart=0
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Welcome to the Adobe Forums,
The CC was aactivated twice on February 21st 2014,
You need to deactivate it from PC,
When you install it on the third computer or for the third time & when you to activate it, if it installed & activated already twice, there will be an option of deactivating it from the previous computers, please click on that.(To deactivate from preinstalled machine, Open any Adobe CC application > Help Menu > Signout.)
Next it will allow you to activate on your new machine,
Now you can go back to your first computer, log out & log back in of Desktopp CC App, launch any product, if there is any product to buy, in that prompt there will be an option to " license the software", please click on that & sign in.
It will reactivate the CC on the first machine.
You have already deactivated it from one machine, hence you can activate it on third computer.