To start the diagnostic, select Start \ Run and jot down in “dxdiag” and click OK. Click Yes to this.
You will then get the DirectX Diagnostic Tool.
The DirectX Files tab will show you if any critical files are missing.
Check the Notes section for a recommendation on fixing the problem.
The Display tab is probably the most important.
you’ve got the option to run some tests here to verify that DirectX is running correctly.
After running each test you will receive a confirmation box such as this one.
There are even cool sound diagnostics you’ve got the option to run using a simple wizard.
