: For advanced users, the Product Code can be updated programmatically during a build using the ISWiAutomation object .
The product code determines the type of update being performed. For a Major Upgrade , you must change the product code to allow the new version to coexist with or replace the old one. For Patches or Minor Upgrades , the product code must remain the same to ensure the installer recognizes the existing installation. Finding and Setting the Product Code installshield product code
Navigate to HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall and search for your product's subkey. 4sysops : For advanced users, the Product Code can
Example of a Product Code shown in an MSI database: Property: ProductCode = {F1A3E5C7-9B2D-4E6F-8A1C-3D5E7F9B1C2D} For Patches or Minor Upgrades , the product
Open your .msi file in an editor like Orca and locate the ProductCode property in the . Advanced Installer Comparison: Product Code vs. Upgrade Code
: It distinguishes your product from every other software on a machine. Even if two packages have the same name, Windows treats them as unrelated if their Product Codes differ.