FInd your dxdiag
For playtesters requiring a “DxDiag” file:
Press [Windows]+[R] to bring up the Run tool.
In the Run window, type in "DxDiag" then [Enter].
From the Direct X Diagnostic window, click on Save All Information
The "DxDiag" filename should appear in the download window. Click on Save.
Submit this file with your playtester feedback form.