When you choose "Offline Activation" in Illustrator CS6, the software generates a unique (a long alphanumeric string). You are supposed to provide this code to Adobe, which returns a Response Code to unlock the software.
Launch Illustrator CS6. When the "Serial Number Validation" screen appears, click . adobe illustrator cs6 offline activation response code fix
Go back to the offline computer and type the Response Code into the "Offline Activation" window. When you choose "Offline Activation" in Illustrator CS6,