Search your archives for "Sony Creative Software" or "Digital River," the primary distributor at the time.
It is used during the initial installation phase to verify that you have a valid license to use the program. --- Sony Acid Pro 7 Serial Number And Authentication Code
Are you trying to or are you having trouble activating the software on a newer version of Windows? #1 How to Install Sony Acid Pro 7 Search your archives for "Sony Creative Software" or