If Windows cannot find the dxdiag program, DirectX version 5.0 or an earlier version of DirectX is installed on your computer. Note: The first time you use the DirectX Diagnostic Tool, you might be asked whether you want to check if your drivers are digitally signed. So, if you have problems when trying to play a game or watch a video and know that it has something to do with DirectX, the first thing we would suggest is to download the latest version of DirectX and perform a re-installation. When you are finished checking file versions, click Exit. In the DirectX Diagnostic Tool, select the System tab, then check the DirectX version under System Information. As for computer games, anything that relies on DirectX wouldn’t run, which is most games available today. On the various tabs, check the version information for each DirectX file. On the System tab, note the version of DirectX that is displayed on the DirectX Version line. To use the DirectX Diagnostic Tool to determine the version of DirectX that is installed on your computer, follow these steps:
This article describes how to determine the version of Microsoft DirectX that is installed on your computer by using the DirectX Diagnostic Tool. Windows 7 Enterprise Windows 7 Home Basic Windows 7 Home Premium Windows 7 Professional Windows 7 Starter Windows 7 Ultimate Windows Server 2008 R2 Datacenter Windows Server 2008 R2 Enterprise Windows Server 2008 R2 for Itanium-Based Systems Windows Server 2008 R2 Standard Windows Vista Business Windows Vista Enterprise Windows Vista Home Basic Windows Vista Home Premium Windows Vista Starter Windows Vista Ultimate Windows Server 2008 Datacenter Windows Server 2008 Enterprise Windows Server 2008 for Itanium-Based Systems Windows Server 2008 Standard Microsoft Windows XP Service Pack 3 Microsoft Windows Server 2003 Service Pack 1 Microsoft Windows Server 2003 Service Pack 2 More.