DirectX is used by most Windows games and high-end graphics programs, so xapofx1_5.dll errors usually only appear with these programs, such as the video games Arma 3, Rise of the Triad, and Dead Island.

Follow these steps in the order given to try the simpler solutions first.

Restart your computer if you haven't already. The error could be a fluke and a simple restart could fix it completely.

Install the latest version of Microsoft DirectX. This will most likely fix the xapofx1_5.dll not found error.