I just bought the CS6 upgrade for my CS5 PS. I bought the upgrade from the Adobe site. Installation fails and says that the upgrae I am trying to install is not a genuine Adobe product. I have entered the serial number exactly and it is verified. I have no idea what to do.
What is the exact error message you are getting ,
you said you have purchased the upgrade , so which serial number is not genuine , CS5 or CS6 ?