"Effective December 13, Adobe disabled the activation server for CS2
products and Acrobat 7 because of a technical glitch. These products
were released over 7 years ago and do not run on many modern operating
systems. But to ensure that any customers activating those old versions
can continue to use their software, we issued a serial number directly
to those customers. While this might be interpreted as Adobe giving
away software for free, we did it to help our customers".