: The official way to use the software for free for a limited time (usually 7-14 days).

Downloading a file like "Adobe Illustrator CS3 Portable -81.8 MB- Free" from unofficial sources carries several risks: Adobehttps://community.adobe.com Illustrator [CS3 is dead and gone] - Adobe Community

: A powerful, completely free, and open-source professional painting and illustration program.