In the Windows operating system, you may see many DLL files that are responsible for the proper functioning of some applications in your computer. These DLL files support the applications to run in the computer properly. But sometimes due to the damaging or removal of these DLL files, you may get some error issues and data loss situation. XAudio2_4.dll is missing error in Windows is also that type of error issue. After occurring of the XAudio2_4.dll not found error in your computer, you will not be able to access the computer or the applications installed in the system will not work too. Hence, it is very important to fix the problem as soon as possible. You can fix this issue with the help of the manual or automatic way of fixing. You can use Advanced System Repair tool for the automatic fixing in the system.