I downloaded the free version of Illustrator CS2, and when I used the serial provided on the download page it said it was invalid; I then proceeded to contact customer service, and was told they no longer support CS2, and to come here; So here I am.
The links Adobe provided for CS2 earlier this year did NOT include a serial number. In fact, the links to download were provided as "activation free" versions for those who already own a license and have a serial number.
If you downloaded CS2 and used some serial number you found on the web, you do not legally have access to the applications. The CS2 download links were only for existing license holders, they were NOT free for everyone.