I am tying to find a solution to this problem, and am unable to find a way to contact Adobe directly for customer assistance. When I click on the Customer Support link at the bottom, the page that loads says, "Error 'This serial number is not for a qualifying product...' when installing an upgrade or upsell." I didn't install an upgrade version of CS5, and I didn't have it on more than one computer. My hard drive crashed at the end of 2013, and I had to replace it with a new one. I wasn't able to deactivate the product on the old hard drive, but it installed just fine on the new one. Now the updates will not work.
Does anyone know how to fix this or how to contact Adobe directly for help? Thanks.