Why does the WiX Toolset System32 directory automatically change into the SysWOW64 directory, and how can it be resolved?

What are the detailed reasons behind the WiX Toolset automatically changing the System32 directory to the SysWOW64 directory on 64-bit systems, and what are the step-by-step solutions to prevent this behavior and ensure that files are correctly installed in the intended directory?

The WiX Toolset automatically changes the System32 directory to the SysWOW64 directory on 64-bit systems due to how it handles system folder properties. Here's a detailed explanation and step-by-step solution:

Reasons Behind the Directory Change System Folder Properties: In WiX, the SystemFolder property typically resolves to C:\Windows\System32 on 32-bit systems and C:\Windows\SysWow64 on 64-bit systems. This behavior ensures compatibility with both 32-bit and 64-bit environments1.

Windows Installer Behavior: The Windows Installer uses similar properties, but the System64Folder property resolves to C:\Windows\System32 on 64-bit systems. This difference can cause confusion when working with WiX1.

Step-by-Step Solution Use Correct Properties: Ensure you are using the correct properties for your target system. For 64-bit systems, use System64Folder instead of SystemFolder.

Check Documentation: Refer to the WiX documentation to understand how these properties are resolved and used in your WiX project.

Test on Both Systems: Test your installer on both 32-bit and 64-bit systems to ensure it behaves as expected.

By following these steps, you can prevent the automatic directory change and ensure that files are correctly installed in the intended directory.