If you cannot find a legitimate CS5 license, consider modern, free alternatives designed to run on older operating systems: A powerful, open-source vector editor.
How to Find Adobe Illustrator CS5 Free Download for Windows 7 Adobe Illustrator Cs5 Free Download Windows 7
A search for "Free Download" links on the internet will inevitably lead to third-party file-sharing blogs, torrents, or unverified software archives. Downloading software from these unauthorized sources carries severe risks: If you cannot find a legitimate CS5 license,
: Allows vector painting that mimics real-world brush strokes (watercolour, oil, etc.). Flash Integration etc.). Flash Integration