If Windows is unable to run applications due to a .dll error, this .dll may be missing or you may have registry error. Such errors can heavily influence the performance of your PC. I strongly recommend that you should run a registry scan (TuneUP Registry Cleaner). X3DAudio1_5.dll is a Microsoft DirectX file.

Usually the error “X3DAudio1_5.dll was not found” occurs is when a certain version of Microsoft DirectX (usually comes with your game) file extension was not installed or not installed properly.

You can download x3daudio1.5.dll from: Here you can download x3daudio1_5.dll for free

To use it, just Extract the file (x3daudio1_5.dll) to Your C:\WINDOWS\system. If you have further problem, then you can contact me form Contact page.