Adobe has disabled the activation server for CS2 products, including Acrobat 7, because of a technical issue. These products were released more than seven years ago, do not run on many modern operating systems, and are no longer supported.
Adobe strongly advises against running unsupported and outdated software. The serial numbers provided as a part of the download may only be used by customers who legitimately purchased CS2 or Acrobat 7 and need to maintain their current use of these products.
Also, the link that used to take the visitor to a page with downloadable product links but now it will take you to the Adobe Creative Cloud page.
Don’t get excited, yes it seems to be free but no, it is not the latest version. I have read on multiple Web sites that Adobe is giving away CS2 suite, it seems to be real but the download page reports errors. That may be due to the heavy demand to download overloading the servers. Although it is several generations old, the core feature set of Photoshop will be there, of course you can download the other products in the suite as well.
Keep the following information handy if you are interested in downloading the software:
The download link: CS2 Downloads (This link no longer takes the user to the expected download site, sorry but it seems that Adobe stopped the downloads.)
Full suite serial number: 1130-0412-8377-1896-9751-5759
Photoshop CS2′s serial number (Win): 1045-1412-5685-1654-6343-1431
Photoshop CS2′s serial number (Mac): 1045-0410-5403-3188-5429-0639
First heard on PetaPixel