@jetztistgut this is what is true : There is no means to activate anymore.
When was the last time you installed and activated on your desktop?
Have you been upgrading the OS and running the same installation of CS3 over the years? That would be the only case where CS3 would continue to work. If you were to uninstall on your desktop youd be in the same situation as your laptop. It cannot activate.
CS3 is not supported and no one here can assist you with getting it to install properly on your laptop. It doesn't matter if you have the invoice, online keys or offline keys.
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