Adobe CS4 includes programs such as InDesign, Photoshop, Illustrator and Dreamweaver. If you need technical support or want to register your Adobe CS4 products, you will need to have access to your serial number. The method you follow to find your serial number depends on whether or not you have already installed the product.
Locate the CD-ROM/DVD-ROM case.
Turn the case upside down.
Locate the 24-digit number on the back of the case. This is the serial number.
Double click the CS4 program's icon to open it.
Click the "Help" menu at the top of the page if you are using a PC or the "Apple" menu if you are using a Mac.
Click "About __ CS4." The blank will say Photoshop, InDesign, Illustrator or whatever other CS4 program you opened. Click on the option you need to receive help finding the serial number.
Click once on the splash screen that appears. The serial number will appear.