: If you have the physical disc, the serial number is usually located on the back of the DVD case or on a sticker inside the box. Registry Check (Windows)
Log in to the Adobe website, go to "Plans & Payment," and check "Order History" or "Registered Products." The Box/Jewel Case: Adobe Illustrator Cs4 Serial Number
: Free trials do not come with serial numbers; they typically last 30 days to allow users to test the software before purchasing a full license. Critical Availability Notice : If you have the physical disc, the
Adobe has decommissioned the activation servers for older versions of Creative Suite. Even if you have a valid, original serial number from a physical box set, the software may fail to "phone home" to verify the license, rendering the installation stuck in a trial loop. Even if you have a valid, original serial
: You can no longer reinstall or activate Illustrator CS4 using traditional methods because the servers required to verify serial numbers are offline. Unsupported Version