Follow these steps to register (DirectX) DLLs (or OCX's):* On the Taskbar, select Start > Run.* In the Open field, type regsvr32 "<path>\NameOfFile.extension", where <path> is the directory where the file is located on your computer and NameOfFile.extension is the name of the file. For example: regsvr32 "C:\Windows\System32\ReverbDirectX.dll"* Press Enter.