: Adobe no longer offers official 30-day trials for CS5; current trials are only available for the latest version of Adobe Illustrator Physical Media

Forums like FileCR, GetIntoPC, or Pirate Bay offer "pre-activated" CS5. While you can download these, the risks are immense:

It was a dark and stormy night in the city of Seattle. Jack, a young and ambitious graphic designer, was on a mission to create the most stunning logo for his client's new startup. He had heard about Adobe Illustrator CS5, the industry-standard software for vector graphics, and was determined to get his hands on it.