on third-party sites. CS6 was the last version available as a one-time purchase, making it very cheap and efficient for older laptops. System Requirements

often leads to more trouble than it’s worth. While the idea of a "no-install" version sounds convenient, these unofficial downloads are common vectors for security risks and performance issues. The Reality of Portable Torrents Security Risks

: If you decide to go with a modern version, remember that Illustrator 2019 and newer typically require at least 8GB of RAM (16GB recommended) and a 64-bit processor to run smoothly.