Installshield Product Code

At its core, the is a Globally Unique Identifier (GUID) – a 128-bit integer value that is guaranteed to be unique across all software on all systems. In the context of an installation built with InstallShield, whether it is a Basic MSI, InstallScript, or any other project type, the Product Code is the key that identifies your product on the target machine.

: Use 1 to make it installed by default; a higher number might hide it unless the user chooses a specific setup type. installshield product code

However, there is a critical nuance that causes endless confusion: InstallShield supports two major project types—InstallScript and MSI (Windows Installer). At its core, the is a Globally Unique

This is where 90% of upgrade failures happen. You cannot treat these two codes interchangeably. At its core