The error "Unity failed to present D3D11" is typically associated with the DirectX 11 (D3D11) technology. Unity uses DirectX for rendering graphics on Windows platforms. If there's an issue presenting D3D11, it's usually because of one or more of the following reasons:
Outdated DirectX version: Your system might be using an outdated version of DirectX that doesn't support specific features required by Unity.
Unsupported Graphics Card: Your graphics card might not support DirectX 11, which is needed to run certain versions of Unity.
Graphics Card Driver Issues: There could be problems with your graphics card drivers, such as outdated drivers or compatibility issues with Unity.
Faulty Unity Build or Settings: The build of Unity you're using could have errors, or certain settings within Unity might cause conflicts with DirectX 11.
Solution - Here's How To Resolve It
To resolve the "Unity failed to present D3D11" error, you can try the following solutions:
Update DirectX: Make sure you have the latest version of DirectX installed on your system. You can download the most recent version from Microsoft's Official Download Page.
Check Your Graphics Card: Verify if your graphics card supports DirectX 11. If it doesn't, you may need to upgrade your hardware or use a version of Unity that supports earlier versions of DirectX.
Update Graphics Card Drivers: Ensure your graphics card drivers are up-to-date. Visit the manufacturer's website to download the latest drivers.
Review Unity Settings: Check the player settings in Unity to make sure they're configured correctly. You can access these settings by navigating to Edit > Project Settings > Player. Under Other Settings, select a compatible DirectX version.
Reinstall Unity: If none of the above works, you might have a corrupted Unity build. Try uninstalling and reinstalling Unity.