Windows 7 32-bit architecture handles memory and DLL files differently than 64-bit systems. Using a 64-bit version of a control panel utility on a 32-bit OS will result in "Not a valid Win32 application" errors. To fix DirectX errors on your system, you must ensure you have the x86 (32-bit) compatible files. Step-by-Step: How to Download and Install 1. Download the Official Microsoft DirectX End-User Runtime
Here is the updated guide on how to safely download and use this utility for your 32-bit system. What is dxcpl.exe? dxcplexe download windows 7 32bit version updated
If a game still won't launch, follow these steps using the tool: Open dxcpl.exe . Windows 7 32-bit architecture handles memory and DLL