Unable to register my serial number on my new computer despite de-activating it in the old computer

Question

I have reinstalled Adobe XI Pro but when I try to register the product it says that my serial number is already in use. I have already de-activated the same serial number in my old computer AND unistalled the program in the OLD computer. Can you please help? I can provide the serial number as well if needed and tried to call the Adobe Help Line but was advised that for this product, I need to post here.

kglad · Accepted Answer

deactivating requires a computer that meets adobe’s security standards, https://community.adobe.com/t5/download-install-discussions/activation-limit-reached-for-non-subscription-adobe-desktop-applications/td-p/14804413?linkId=100000376554410

there’s no other option. once you attempt to deactivate with a computer that fails to convey the deactivation to adobe’s servers, that computer can no longer be used to restore an activation.

John T Smith · Answer

See the note about communication with Adobe's servers in this (TLS requirement)
Adobe policy is that manual adjustment of an activation count is now not done
https://community.adobe.com/questions-617/install-and-activate-old-serial-number-programs-1643189

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