I upgraded my desktop and laptop and am having trouble with my licensed version of CS3. I spent over an hour with the Adobe Chat line to try to resolve the issues. My desktop computer (iMac) says: "Licensing for this product has stopped working." It quits the program after that message, so I cannot deactivate CS3 on that computer. My laptop says that I need to deactivate the software on the other computer in order to activate it on the laptop. After an hour on Adobe Chat, it abruptly ended unresolved with:
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Can my licensed version be deactivated from all current computers so I can reactivate on my new computer? I'm in the middle of a project with a deadline and need this program. My Adobe account shows that I purchased it, so it's legitimate. I just can't access it now.
On this page you should be able use the Chat Now button at the bottom of the page and then adobe can reset your activations
Also, this might fix the error your seeing in case you want to use cs3 on your desktop, because you are allowed to have cs3 installed on two of your own computers.
I wish I had an answer for you. I have the same problem. I'd been using CS3 on my laptop after my 2006 iMac died and it worked fine under Mavericks. Now that I've bought a new iMac, I can't get it to run. It says the serial number I have is out of date. But why does it run on the laptop and not the iMac? Hoping we both get an answer.