What is  Desktop Window Manager? |How does DWM Works?

What is  Desktop Window Manager? |How does DWM Works?

What is  Desktop Window Manager? |How does DWM Works? Find out what the Desktop Window Manager (DWM) does, how it functions, and how common problems with DWM can be resolved.


You might wonder what the Desktop Window Manager process does if you’ve looked at your Windows Task Manager. As part of the Windows operating system, the Desktop Window Manager renders the visual effects and user interface elements on your desktop. 

He is an integral part of the Windows operating system. This guide aims to provide a detailed overview of the DWM, explain how it works, and provide tips for troubleshooting common issues.

What is a desktop window manager?

A background process on your Windows operating system called Desktop Window Manager (DWM) is responsible for rendering the visual effects and user interface elements you see on your desktop, including window borders, transparency, and Aero Glass. 

A DWM is a software application that combines the visual elements of all open windows and displays them on the screen, using your graphics hardware to speed up the rendering process. 

As a result, the Windows operating system performs better and responds more responsively. The DWM is an integral part of the operating system and essential to its proper operation.

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How desktop window manager works?

Desktop Window Manager (DWM) displays all open windows on the screen by combining their visual elements. In addition to improving the overall performance and responsiveness of the operating system, it accelerates rendering using your graphics hardware.

I will give you a more detailed explanation of how the DWM works in the following manner:

  1. You can see the title bar, borders, and contents of a window or application when you open it on the desktop using the window manager.
  2. In video memory, the DWM stores the combined visual elements of all open windows.
  3. The DWM displays the combined image using the graphics hardware on your computer.
  4. DWM updates the combined image in video memory when you move or resize a window.
  5. By continuing to composite and render all open windows in this way, the DWM maintains a responsive and up-to-date user interface.

Common issues with DWM:

DWM (Desktop Window Manager) may experience a few common issues, including crashing or high CPU usage.

A crash of DWM can result in an error message appearing on the screen and the desktop becoming unresponsive. Various factors, such as outdated graphics drivers, hardware problems, and conflicts with other applications, can cause this.

Your computer can also be slowed down by high CPU usage by the DWM, which can negatively impact its performance. As a result, the DWM may work harder than usual to composite and render the visual elements of open windows or indicate a problem with the DWM.

There is a possibility of encountering problems with the DWM, although they are rare. If you do encounter problems with the DWM, you can follow these steps to troubleshoot the problem.

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Troubleshooting DWM issues:

If you are experiencing problems with the Desktop Window Manager (DWM), here are a few steps you can take to try and troubleshoot the problem:

1. Update your graphics drivers: 

You must have the latest graphics drivers installed to use the DWM properly. You can update your drivers from the Device Manager or the manufacturer’s website of your graphics card.

2. Disable visual effects: 

Transparency and Aero Glass are examples of visual effects that may sometimes cause difficulties with the DWM. 

To disable these effects, go to the Performance Options menu (found in the System Properties window) and uncheck the boxes next to the effects you wish to disallow.

3. Reset or repair the DWM: 

If the above steps do not resolve the issue, you might need to reset or repair the DWM. To do this, you can use the System File Checker tool, a built-in Windows feature that checks for corrupt files and replaces them.

You can run the System File Checker tool by following these steps:

  • As an administrator, open the command prompt.
  • Using the Enter key, type “SFC/scannow” in the command line.
  • The tool will try to automatically correct any problems it finds after the scan has been completed.

A manual reset or repair of the DWM may be necessary if the DWM issue persists despite running System File Checker. 

Another built-in tool in Windows that can be used to solve operating system issues is DISM (Deployment Image Servicing and Management), which can be used to do this.

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1. Is it safe to disable Desktop Window Manager?

The dwm.exe file can be disabled in old versions of Windows. However, you shouldn’t delete or disable it since it plays an important role in Windows. You can disable the dwm.exe process if you wish to maximize your computer’s performance or are concerned about the amount of memory it uses.

2. Can I uninstall Windows Manager?

“Windows Manager” should be the first entry in the uninstall programs window. Click on “Uninstall” or “Remove” after selecting it. Scan your computer for any remaining components or possible malware infections after uninstalling the potentially unwanted application (which causes Windows Manager ads).


In Windows, the Desktop Window Manager (DWM) renders the visual effects and user interface elements on your desktop as part of the operating system. 

Compositing all open windows’ visual elements and displaying them on your screen accelerates the rendering process using your graphics hardware. 

Even though the DWM is rarely problematic, it can sometimes crash or consume a lot of CPU resources. 

It may be necessary to update your graphics drivers, disable visual effects, or reset or repair the DWM using the System File Checker or DISM tool if you experience DWM problems. 

To ensure optimal performance of your Windows operating system, it is critical to maintain and troubleshoot the DWM.

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