The d3dx9_27.dll file is one of many files that make up DirectX. Since DirectX is used by most Windows-based games, d3dx9_27.dll errors usually only appear when using those programs.
d3dx9_27.dll Missing Error | How to Fix | 2 Solutions | 2021
Follow these steps in the order they are presented below to try the most likely solutions first.
Restart your computer, unless you have already done so after the problem started.
The d3dx9_27.dll error may be a one-time issue, and a simple reboot may fix it completely. This is unlikely to fix the issue, but a reboot is always a good first step.