I bought PS-CS5 from a retail dealer on ebay. It came home in a sealed carton and it looked new.
When I started installing it I typed my serial number, successfully. Then when the install was done it says; "Serial number invalid".
I tried uninstalling and installing it again, same thing.
Then I tried register the product on adobe.com, said the same thing "Invalid serial number".
I have no idea what to do?
Is there a way to get a serial number from any of the other numbers on the carton?
Thanks in advance.
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It is possible that you have a counterfeit copy, or somebody has already used that serial number.