Navigate to the following key for 64-bit systems or 32-bit applications on 32-bit systems: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
Developers often confuse the three core Windows Installer GUIDs. Each serves a distinct role in deployment logic:
Understanding the InstallShield Product Code: A Guide for Developers
If performing a Major Upgrade, generate a new Product Code and ensure your Upgrade Table is correctly configured to remove the old version. Command-Line Silent Uninstallation Failures installshield product code
Error: "Another version of this product is already installed"
When a user opens (or Add/Remove Programs ) and clicks Repair , Windows looks up the Product Code. It fetches the cached installation metadata to verify and restore missing or corrupted files. 3. Uninstallation
Ensure your GUID strings always use uppercase letters ( A-F ). Windows Installer can occasionally fail or duplicate entries if lowercase letters are mixed into registry paths. Navigate to the following key for 64-bit systems
In the right-hand panel, look down the column for ProductCode . The corresponding value is your GUID. 3. Via the Windows Registry (For Installed Software)
Here is everything you need to know about what it is, why it matters, and how to manage it effectively. What is an InstallShield Product Code?
: The name shown to the user during installation. It fetches the cached installation metadata to verify
: It distinguishes one software application from another. Windows Installer treats two products with different Product Codes as unrelated, even if they share the same name. Installation Logic
stays the same for the entire lifetime of your application, the Product Code
Additionally, change the code if you change the name of the executable file, modify the installation architecture (e.g., switching from 32-bit to 64-bit), or change the product language. How to Find and Modify the Product Code in InstallShield