Last updated: August 25, 2026
DirectX is a collection of Windows technologies that allows games and other multimedia applications to communicate with your computer's graphics, audio, and input hardware.
If you play PC games, you may have seen errors mentioning DirectX, Direct3D, or missing files such as d3dx9_*.dll. These problems can be confusing because having a newer version of DirectX does not always mean that every legacy DirectX component required by an older game is installed.
This guide explains what DirectX does, how to check your DirectX version in Windows 10 and Windows 11, how DirectX is updated, and what to do when a game reports a DirectX problem.
Table of Contents
- What Is DirectX?
- What Are the Main Parts of DirectX?
- Do You Need DirectX?
- Which Version of DirectX Do You Have?
- How to Check Your Graphics Driver
- How to Update DirectX in Windows 10 and 11
- Why Does a Game Ask for DirectX 9?
- How to Fix a Missing DirectX DLL Error
- Can You Uninstall DirectX?
- How to Use DxDiag for Troubleshooting
- What If Direct3D or Graphics Acceleration Is Not Working?
- What If the Graphics Driver Is Causing the Problem?
- Common DirectX Problems and Solutions
- DirectX and Graphics Card Compatibility
- Should You Download DirectX From Third-Party Websites?
- Frequently Asked Questions
- Related Windows Troubleshooting Guides
What Is DirectX?
DirectX is a set of Windows components and APIs designed to help software communicate with hardware such as your graphics card and sound device.
It is especially important for:
- PC games
- 3D graphics
- Video playback
- Audio effects
- Multimedia applications
- Game controllers and other input devices
Modern Windows versions include DirectX as part of the operating system. You normally do not need to download a separate "latest DirectX" package just to update the version built into Windows.
For Windows 10 and Windows 11, Microsoft recommends using Windows Update to obtain the latest DirectX version available for your operating system.
What Are the Main Parts of DirectX?
DirectX contains several technologies. Some of the names you may encounter include Direct3D, Direct2D, DirectSound, and DirectInput.
Direct3D
Direct3D is the part of DirectX most closely associated with 3D graphics.
Games use Direct3D to communicate with graphics hardware and render objects, lighting, textures, shadows, and other visual effects.
The actual performance and graphics quality also depend heavily on your GPU, graphics driver, processor, memory, and the game's requirements.
Direct2D
Direct2D provides hardware-accelerated 2D graphics capabilities for Windows applications.
It is used for rendering graphical elements such as shapes, text, and other 2D content.
DirectSound
DirectSound provides audio-related functionality for applications and games.
Modern Windows audio systems use newer technologies as well, but older applications may still depend on legacy DirectSound components.
DirectInput
DirectInput provides support for input devices such as keyboards, mice, game controllers, and other devices.
Some older games continue to use DirectInput even though newer applications may use other input technologies.
Do You Need DirectX?
Yes. DirectX components are an important part of Windows and are used by many games and multimedia applications.
If a game requires a particular DirectX feature, your graphics hardware and driver must also support the required feature level.
Having DirectX installed does not automatically mean that your PC meets every game's graphics requirements.
For example, a game may require a newer Direct3D feature level that your graphics card does not support.
Which Version of DirectX Do You Have?
You can check your installed DirectX version using the DirectX Diagnostic Tool, also known as DxDiag.
Windows 10 and Windows 11 include this diagnostic tool.
How to Check Your DirectX Version
- Press Windows + R.
- Type
dxdiag. - Press Enter.
- If Windows asks whether you want to check if your drivers are digitally signed, select Yes.
- On the System tab, look under System Information.
- Find DirectX Version.
DxDiag is also useful for collecting system information when troubleshooting DirectX-related problems.
How to Check Your Graphics Driver
DirectX problems are sometimes caused by graphics driver problems rather than DirectX itself.
In DxDiag:
- Open the Display or Display 1 tab.
- Check the graphics device name.
- Look at the driver information.
- Check the available feature information.
If you are experiencing display problems at the same time, see our guide on how to fix a flickering screen in Windows 10 and Windows 11.
How to Update DirectX in Windows 10 and 11
You generally should not download a random DirectX installer from a third-party website.
For Windows 10 and Windows 11, use Windows Update to obtain the latest DirectX version available for your operating system.
To Check for Windows Updates
- Press Windows + I to open Settings.
- Open Windows Update.
- Select Check for updates.
- Install available updates.
- Restart your computer if Windows asks you to.
Keeping Windows and your graphics driver updated can help prevent compatibility problems with newer games.
If your PC has become slow, see our guide on how to fix a slow Windows 11 PC.
Why Does a Game Ask for DirectX 9 When I Have DirectX 12?
This is one of the most confusing DirectX issues.
You may check DxDiag and find that your computer has DirectX 12, while an older game reports that a DirectX file is missing.
This does not necessarily mean that DirectX 12 needs to be replaced.
Older games can depend on optional legacy DirectX components that are separate from the core DirectX version shown by DxDiag.
For example, an older game may look for files such as:
d3dx9_*.dllxinput1_3.dll- Other legacy DirectX components
Installing a newer core DirectX version does not necessarily install every legacy component used by older games.
How to Fix a Missing DirectX DLL Error
If an older game displays an error saying that a DirectX DLL is missing, do not download an individual DLL file from an unknown website.
Instead, identify which DirectX component the game requires and use an appropriate Microsoft-provided runtime or the DirectX installer supplied with the game.
For older games, the DirectX End-User Runtimes (June 2010) package can provide legacy components that are not replaced simply by having a newer DirectX version installed.
Can You Uninstall DirectX?
You should not try to uninstall the DirectX components built into Windows.
DirectX is integrated into Windows, and the normal solution to a DirectX problem is not to remove DirectX.
If a game has a DirectX problem, troubleshoot the game, graphics driver, Windows installation, or the specific missing legacy component instead.
How to Use DxDiag for Troubleshooting
DxDiag is useful when a game does not start or displays graphics or sound errors.
Open it by pressing:
Windows + R → type dxdiag → Enter
1. System Tab
Look for:
- Windows version
- Processor
- Memory
- DirectX version
This information helps determine whether the computer meets the basic requirements of the software.
2. Display Tab
Check:
- Graphics card
- Display memory information
- Driver information
- Feature levels
- Direct3D-related information
If the graphics device or driver information looks incorrect, investigate the graphics driver before attempting to reinstall DirectX.
3. Sound Tab
If the problem involves game audio, check the available sound devices and driver information.
4. Save DxDiag Information
If technical support asks for your system information, DxDiag can save the diagnostic report.
Open DxDiag and select Save All Information....
The resulting text file can then be shared with a technician or support team.
What If Direct3D or Graphics Acceleration Is Not Working?
If Direct3D is unavailable or a game cannot use your graphics hardware, check these areas instead:
- Restart the computer.
- Install pending Windows updates.
- Update the graphics driver.
- Check DxDiag for graphics errors.
- Confirm that the graphics card meets the game's minimum requirements.
- Repair or reinstall the affected game if its installation is damaged.
- Check whether the problem occurs only with one game.
If Windows itself has corrupted system files, see our guide on how to fix corrupted Windows system files.
What If the Graphics Driver Is Causing the Problem?
A damaged or incompatible graphics driver can cause:
- Game crashes
- Black screens
- Screen flickering
- Low graphics performance
- Direct3D errors
- Display driver crashes
- Games refusing to start
If you are seeing general display problems, read our guide to fixing a flickering screen in Windows 10 and Windows 11.
If Windows has become unstable after an update or driver installation, learn how to boot Windows 10 and 11 in Safe Mode.
Common DirectX Problems and Solutions
| Problem | What to Try |
|---|---|
| Game says DirectX is missing | Check the game's required DirectX version and components. |
d3dx9_*.dll is missing |
Install the appropriate legacy DirectX components. |
| Direct3D error | Update the graphics driver and check GPU compatibility. |
| Game crashes after startup | Update Windows and graphics drivers, then repair or reinstall the game. |
| Graphics are corrupted | Check GPU drivers, temperatures, and game settings. |
| DxDiag shows an unexpected graphics device | Check Device Manager and reinstall or update the graphics driver. |
| Old game will not start | Check whether it requires legacy DirectX components or compatibility settings. |
| DirectX installer says a newer version is already installed | Check whether the application actually needs legacy components rather than a newer core DirectX version. |
DirectX and Graphics Card Compatibility
DirectX is only one part of game compatibility.
Your PC may have DirectX 12 installed but still be unable to run a particular game because the graphics card does not support the required feature level.
Other important factors include:
- GPU model
- GPU driver
- Processor
- RAM
- Available storage
- Windows version
- Game-specific requirements
If your computer is experiencing general performance problems, you can also read our guide on how to fix 100% disk usage in Windows.
Should You Download DirectX From Third-Party Websites?
No.
Avoid websites that offer individual DirectX DLL files or unofficial "DirectX updater" programs.
A missing DLL may be a symptom of a missing legacy runtime, a damaged game installation, or another Windows problem.
Use Windows Update for the DirectX components integrated into Windows, and use Microsoft's official runtime packages or the game's own installer when legacy components are required.
Frequently Asked Questions
Does Windows 10 have DirectX?
Yes. Windows 10 includes DirectX, and Microsoft provides DirectX updates through Windows Update.
Does Windows 11 have DirectX?
Yes. Windows 11 includes DirectX, and Windows Update provides the latest DirectX version available for the operating system.
How do I check DirectX on Windows 10 or 11?
Press Windows + R, type dxdiag, press Enter, and check DirectX Version on the System tab.
Can I install DirectX 9 on Windows 11?
Windows 11 can run older games that require legacy DirectX components. In some cases, you need to install the appropriate legacy DirectX runtime components rather than replacing the DirectX version built into Windows.
Can I uninstall DirectX from Windows?
No. DirectX is integrated into Windows. You should troubleshoot the particular DirectX, graphics, driver, or game problem instead of attempting to remove it.
Why does a game say DirectX is missing when DxDiag shows DirectX 12?
The game may require a legacy DirectX component that is not included simply because the system reports DirectX 12. Older games can depend on optional DirectX libraries and components.
Should I download a missing DirectX DLL separately?
No. Avoid downloading individual DLL files from unofficial websites. Use the appropriate Microsoft runtime or the installer supplied with the game.
Related Windows Troubleshooting Guides
- Windows 11 Wi-Fi Not Working: 15 Ways to Fix It
- How to Fix a Slow Windows 11 PC
- How to Fix Corrupted Files in Windows 10 and 11
- How to Boot in Safe Mode on Windows 10 and 11
- How to Fix Flickering Screen in Windows 10 and 11
- How to Fix 100% Disk Usage in Windows
Final Thoughts
DirectX is an important part of Windows gaming and multimedia, but you normally do not need to manually install a newer DirectX version on Windows 10 or Windows 11.
Start by checking your system with DxDiag. If the problem involves an older game, determine whether it needs a legacy DirectX component rather than assuming that your current DirectX version is missing.
Keep Windows and your graphics drivers updated, use official Microsoft runtimes when legacy components are required, and avoid downloading individual DirectX DLL files from untrusted websites.
Computerdok provides practical Windows and PC troubleshooting guides to help you diagnose common computer problems.
Disclaimer: Windows settings, DirectX components, graphics drivers, and game requirements can vary by Windows version, hardware, and software. Always use official Microsoft or hardware-manufacturer sources when downloading system components or drivers.