As of 2026, Illustrator CS3 is considered "officially dead and gone" by the Adobe Community.

Q: Can I upgrade from Adobe Illustrator CS3 to a newer version? A: Yes, you can upgrade to a newer version of Adobe Illustrator. Adobe often offers discounted upgrades for existing customers.

: For physical copies, the 24-digit serial number is typically located on the back of the DVD case or inside the product packaging.

The serial number is usually a combination of letters and numbers, and it's specific to your software version and product. For example, the serial number for Adobe Illustrator CS3 might look something like this: "VK6HF-7THJ2-KW986-G19PY-4JTRH".