Installing these extra files does not "downgrade" your system's DirectX version. Instead, it adds a library of historical components that sit alongside your modern DX12 files, ensuring that when an old game asks for a specific 2006-era file, the system can provide it. Summary of Importance
: Essential for modern 64-bit operating systems to handle higher memory addresses and improved processing efficiency while maintaining a "side-by-side" environment for older software. Why "Extra Files" are Necessary
Once the installer finishes, you can safely delete the temporary folder ( C:\DXTemp ) used for extraction.