Diagnosing basic problems with DirectX

If you're having problems getting a game or movie to play properly, the DirectX Diagnostic Tool can help you pinpoint the source. DirectX is a suite of technologies used by many of the multimedia programs in Windows.

Click to start the DirectX Diagnostic Tool.

What to look for
Once the Diagnostic Tool has finished, here are three key things to check:

Check your video card

Some programs run very slowly—or not at all—unless Microsoft DirectDraw or Direct3D hardware acceleration is turned on.

To determine this, click the Display tab, and then under DirectX Features, check to see whether DirectDraw, Direct3D, and AGP Texture Acceleration appear as Enabled. If not, try turning on hardware acceleration.

Click to open Screen Resolution.

Click Advanced settings.

Click the Troubleshoot tab, and then click Change settings. Administrator permission required If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

Move the Hardware Acceleration slider to Full.

If that fails, you might need to update the video driver or the card, itself. You can typically find the latest drivers for your hardware in the support section of the manufacturer's website.

Check your game controller

If a joystick or other input device fails to respond, it might not be installed correctly.

Make sure the device shows up on the Input tab. If not, reinstall the device according to the manufacturer's instructions. If it's a USB device, unplug it and then plug it back in.

Check for "unsigned" drivers

A driver that's been digitally signed has been tested by the Microsoft Windows Hardware Quality Lab for DirectX compatibility.

If the Diagnostic Tool flags an unsigned driver, updating the driver might solve your problem. You can typically find the latest driver for your hardware on the support section of the manufacturer's website.

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