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Here's how to Fix DirectX Could not allocate sufficient memory to complete a call on Windows.

The DirectX Could not allocate sufficient memory to complete a call error message is a common error that can occur when running graphics-intensive applications, such as games or video editing software. The error indicates that DirectX, the underlying graphics API used by Windows, was unable to allocate enough memory to render the graphics for the application.

There are a few possible causes for this error:

* **Insufficient system memory.** If your computer does not have enough RAM, DirectX may not be able to allocate the memory it needs to render the graphics.
* **Outdated graphics drivers.** Outdated or corrupt graphics drivers can also cause this error.
* **Hardware problems.** A faulty graphics card or other hardware component can also cause this error.

Here are some things you can try to fix the DirectX Could not allocate sufficient memory to complete a call error:

* **Check your system memory.** To check how much RAM your computer has, open the Task Manager and go to the Performance tab. The amount of RAM listed under Memory is the total amount of RAM installed in your computer. If the amount of available memory is less than the amount of used memory, you may need to add more RAM to your computer.
* **Update your graphics drivers.** To update your graphics drivers, go to the website of your graphics card manufacturer and download the latest drivers for your specific graphics card.
* **Run a diagnostic tool.** There are a number of diagnostic tools that can be used to check for hardware problems. One such tool is the Windows Memory Diagnostic Tool. To run the Windows Memory Diagnostic Tool, open the Start menu and search for "Windows Memory Diagnostic". Click on the top result to launch the tool.

If you have tried all of the above and you are still getting the DirectX Could not allocate sufficient memory to complete a call error, you may need to contact the manufacturer of your graphics card for further assistance.