How to Fix: Dota 2 D3D9 Error?


Dota 2 is a multiplayer interactive and online battle arena video game launched in 2013. Many gamers have complained about the Dota 2 D3D9 error while playing. You can receive this error message while playing Dota 2 or the error Rocket League failed to create d3d9. Also, Smite and many more Multiplayer video games can produce this error.

You may see the Dota 2 D3D9 problem if your graphics driver is out-of-date, damaged, or incompatible. To resolve the issue in this instance, upgrade your graphics driver.

On Dota 2, you can acquire loot, advance your character’s level, or gain valuable achievements while playing. But due to this error message, you won’t be able to play the game. To help you with this, you will learn how to handle this error and continue playing your games without interruption.

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Methods To Fix The Dota 2 D3D9 Error

Try the below methods to resolve the Dota 2 error to play games when you receive such an error.

Game Resolution

If the current monitor display configuration and the resolution of the game are different, you may receive this error. Therefore, to fix the error when unable to use d3d9 Dota 2, you need to change the resolution of the game to match your monitor’s configuration.

So, before we go ahead and do that, you need to check and confirm your Windows PC resolution. Now you need to match it with the resolution of the game to move ahead with this method.

Follow the below steps to change the game resolution according to the monitor’s resolution.

  1. In File Explorer, you need to navigate to your game folder, where it is saved.
  2. Now you need to search and open a file ending with an extension folder
  3. Now in there, you need to change the resolution to the one on your monitor.

You should now open and check the game to see if the error is resolved or still showing up. There is another method to fix the resolution problem to match your monitor through Steam. 

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Fix The Error Through Steam

You need to launch your game through Steam in windowed mode, which will match your game resolution with the monitor’s resolution. Follow the below steps to fix the error failed to create d3d9 device through Steam.

  1. First, you need to launch the Steam client and then go to the Library option.
  2. Now find your game in the question section and then right-click to select the Properties option.steam
  3. Find the General tab where you need to choose the Set Launch Options.
  4. In the text field, type windowed and click Ok to launch it on your PC.

At first, the game will start in s smaller window; however, you adjust the size easily. Check if the Dota 2 D3D9 error is gone or still persists.

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Update Your Graphics Driver

If your graphics driver is outdated, corrupted, or incompatible, then you can probably receive the Dota 2 D3D9 error. You can try this method and update your computer’s graphics driver to fix the error.

  1. Right-click the Windows icon or press Windows + R to open the Run window. Or you can type Run on the start menu.update drivers
  2. In the text field, type devmgmt.msc and press enter button.
  3. This command will open up the Device Manager window.
  4. You need to locate and expand the Display adapter options.
  5. Now right-click on the graphics card to select the Update driver option from the list.
  6. You will see two options from which you should click on the Search automatically for updated driver software.graphic driver
  7. Rest you need to sit and wait as the system will automatically do the needful to update the graphics driver.

Reinstall DirectX Runtimes

It might be possible that the DirectX Runtimes do not work the way they should, which can also cause the Dota 2 D3D9 error. You need to reinstall it and then check if it resolves the error or still you are unable to play games.

To reinstall the DirectX Runtimes, you need to follow the below steps:

  1. Find and download the DirectX End-User Runtimes on your system.
  2. Double-click to open the downloaded file.directx
  3. Now you need to follow the on-screen prompts to finish the installation process on your system.

This reinstallation process will fix any bugs and errors in the DirectX Runtimes software. Now the error should not come back, and you should be able to play games without interruption.

Windows Registry

The Windows Registry store most of the application’s data like DirectX Runtime. However, over time due to, fragmentation and some invalid entries can cause the Dota 2 D3D9 error. In this case, it is crucial that you should repair and fix the Registry for it to work effectively.

To fix it, you can use tools available online to scan for any fixes and repair them. Before tweaking anything in the Registry, make sure to take a backup of your system. It is important because if anything goes wrong with the Registry, you won’t be able to recover it later.registry editor

After you repair and fix issues in the Registry, you need to restart your computer or laptop. This will fix any bugs and update the Registry to function correctly. As soon as the system is ready and running, refresh it and test for the DOTA 2 error creating direct3d9 device that should be gone now.

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What did the D3D9 error mean?

When there is an issue with the Microsoft DirectX, the D3D9.dll problem occurs. This error is one of the many that you can find in the DirectX software. So, DirectX is widely used by the WIndows-based games and advanced graphics programs. And therefore, the error D3D9 appears while using these programs or playing games.

Why can I not open my Dota 2?

Updating the graphics driver can resolve issues with Dota 2 and also if you are unable to open it. Outdated drivers can affect your software's performance even if the hardware requirements and up-to-date. Therefore try to update the drivers whenever you face such issues and errors.

Do Windows 10 support Dota 2?

The games that you have installed on your PC, like Dota 2, will work fine if the files on your disk are not corrupted. You should check and verify the integrity of your game files when you face issues or errors with Dota 2.

Is a 4GB laptop good for Dota 2?

The Dota 2 system requirements include at least 15GB of free space for installation. You need an Intel Pentium D915 minimum CPU requirement, whereas a CPU with Intel Core i3-2120 would also work well. A 4GbB Ram is good; however, an 8GB Ram is preferred.


We have discussed the methods to resolve Dota 2 D3D9 error while playing. One of these methods will work, and you will be able to play video games on Dota 2. There could be different reasons for different users to receive the d3d9 device error. And various solutions will work for people facing this error as per its occurrence.

That is the reason we can’t say exactly which solution will work for you the best when you receive an error. Try one of these solutions and check if the error has gone, and you can play games flawlessly. As you have four methods, you can try another if the previous one didn’t solve the problem.

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