I had to replace my motherboard and I need to re-install the OS.
I have registered Acrobat 8 Pro and it was activated, but since a recent update the deactivate button is greyed out. I have tried the repair function and tried to re-register but it has not helped.
I have had this problem before and the only solution I have found is to un-install the app, re-install the app and then apply the updates before registering and re-activating but the problem with this is obvious. I had the same issue with V7 pro.
This process is insane and customer service is just about zero help. It boggles the mind that there isn't a way for Adobe Customer Service to delete the previous activations of the product. What a horrible design for their licensing system!