InstallShield Product Code is a unique Globally Unique Identifier (GUID)
Description: A brief text explaining what the feature includes. installshield product code
| Identifier | Scope | When it changes | Used for | | :--- | :--- | :--- | :--- | | Product Code | Per-version | Every major or minor release (if new install logic is needed) | Identifying the installed instance of a product. | | Package Code | Per-build | Every single build (always) | Uniquely identifying the .MSI file itself. Do not manually change this. | | Upgrade Code | Per-product | Never (over the lifetime of the product) | Linking all versions of the same product for major upgrades. | InstallShield Product Code is a unique Globally Unique
Version Upgrades: When upgrading a product version, you might need to generate a new product code, especially if significant changes are made. Product information stored under:
: If two different installers share the same Product Code, Windows will assume they are the same product, leading to "Another version of this product is already installed" errors. How to Find and Generate Product Codes in InstallShield