The product key is saved within a specific registry key.
#ADOBE ILLUSTRATOR CS5 1 SERIAL SERIAL NUMBER#
Adobe, just like any other software developer, saves the serial number of CS5/CS6 in the Registry of Windows OS. Re: Illustrator CS5 Serial Number Bani Verma 2:44 AM (in response to tanyab77575254) Hi Tanyab77575254, As you have mentioned you would like to install and use Adobe CS5 on your new machine because the old computer crashed, however you do not have your serial number with you.