Desktop Window Manager Process: Why Is It Running In Task Manager?

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Written by: Stelian Pilici

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When you open the Task Manager on your Windows computer, you may notice a process called “Desktop Window Manager” (DWM) running in the background. This process, also known as dwm.exe, is an essential component of the Windows operating system. In this article, we will explore the purpose of the Desktop Window Manager process, its functions, and why it is running in Task Manager.

Windows Task Manager

What is the Desktop Window Manager?

The Desktop Window Manager is a Windows service that manages the visual effects and rendering of the graphical user interface (GUI) in Windows. It was introduced in Windows Vista and has been present in all subsequent versions of the operating system, including Windows 7, Windows 8, and Windows 10.

The primary function of the Desktop Window Manager is to enable the use of advanced graphical features, such as transparent windows, live thumbnails, and visual effects like Aero Glass. It offloads the graphical processing from individual applications to the GPU, resulting in smoother animations and improved overall performance.

Why is the Desktop Window Manager running in Task Manager?

When you see the Desktop Window Manager process running in Task Manager, it indicates that the process is actively managing the visual effects and rendering of the Windows GUI. It is a normal and expected behavior for the Desktop Window Manager to be running in the background.

However, there are certain scenarios where the Desktop Window Manager process may consume excessive system resources, leading to performance issues. If you notice high CPU or GPU usage by the dwm.exe process, it could be an indication of a problem.

Possible Causes of High CPU or GPU Usage by Desktop Window Manager

1. Compatibility Issues: In some cases, compatibility issues between the Desktop Window Manager and certain applications or drivers can cause high CPU or GPU usage. Outdated or incompatible graphics drivers are a common culprit.

2. Visual Effects Settings: The visual effects settings on your Windows computer can also impact the resource usage of the Desktop Window Manager. Enabling excessive visual effects or using high-resolution wallpapers can put additional strain on the system.

3. Malware or Virus Infection: While rare, malware or virus infections can also cause abnormal behavior in the Desktop Window Manager process. It is always recommended to scan your computer for malware using a reliable antivirus software like Malwarebytes Free.

How to Fix High CPU or GPU Usage by Desktop Window Manager

If you are experiencing high CPU or GPU usage by the Desktop Window Manager process, here are some steps you can take to resolve the issue:

1. Update Graphics Drivers

Outdated or incompatible graphics drivers can cause compatibility issues with the Desktop Window Manager. Visit the website of your graphics card manufacturer and download the latest drivers for your specific model. Install the updated drivers and restart your computer.

2. Adjust Visual Effects Settings

Open the Control Panel on your Windows computer and search for “Performance.” Click on “Adjust the appearance and performance of Windows” and select the “Visual Effects” tab. Choose the “Adjust for best performance” option or manually disable specific visual effects to reduce the strain on the Desktop Window Manager.

3. Scan for Malware

Perform a thorough scan of your computer using a reliable antivirus software like Malwarebytes Free. If any malware or viruses are detected, follow the recommended steps to remove them from your system.

Conclusion

The Desktop Window Manager process, also known as dwm.exe, is an integral part of the Windows operating system. It manages the visual effects and rendering of the Windows GUI, offloading the graphical processing to the GPU for improved performance. While it is normal for the Desktop Window Manager to be running in Task Manager, high CPU or GPU usage by the process can indicate compatibility issues, visual effects settings, or malware infections. By updating graphics drivers, adjusting visual effects settings, and scanning for malware, you can resolve any performance issues related to the Desktop Window Manager process and ensure a smooth user experience on your Windows computer.

How to Stay Safe Online

Here are 10 basic security tips to help you avoid malware and protect your device:

  1. Use a good antivirus and keep it up-to-date.

    Shield Guide

    It's essential to use a good quality antivirus and keep it up-to-date to stay ahead of the latest cyber threats. We are huge fans of Malwarebytes Premium and use it on all of our devices, including Windows and Mac computers as well as our mobile devices. Malwarebytes sits beside your traditional antivirus, filling in any gaps in its defenses, and providing extra protection against sneakier security threats.

  2. Keep software and operating systems up-to-date.

    updates-guide

    Keep your operating system and apps up to date. Whenever an update is released for your device, download and install it right away. These updates often include security fixes, vulnerability patches, and other necessary maintenance.

  3. Be careful when installing programs and apps.

    install guide

    Pay close attention to installation screens and license agreements when installing software. Custom or advanced installation options will often disclose any third-party software that is also being installed. Take great care in every stage of the process and make sure you know what it is you're agreeing to before you click "Next."

  4. Install an ad blocker.

    Ad Blocker

    Use a browser-based content blocker, like AdGuard. Content blockers help stop malicious ads, Trojans, phishing, and other undesirable content that an antivirus product alone may not stop.

  5. Be careful what you download.

    Trojan Horse

    A top goal of cybercriminals is to trick you into downloading malware—programs or apps that carry malware or try to steal information. This malware can be disguised as an app: anything from a popular game to something that checks traffic or the weather.

  6. Be alert for people trying to trick you.

    warning sign

    Whether it's your email, phone, messenger, or other applications, always be alert and on guard for someone trying to trick you into clicking on links or replying to messages. Remember that it's easy to spoof phone numbers, so a familiar name or number doesn't make messages more trustworthy.

  7. Back up your data.

    backup sign

    Back up your data frequently and check that your backup data can be restored. You can do this manually on an external HDD/USB stick, or automatically using backup software. This is also the best way to counter ransomware. Never connect the backup drive to a computer if you suspect that the computer is infected with malware.

  8. Choose strong passwords.

    lock sign

    Use strong and unique passwords for each of your accounts. Avoid using personal information or easily guessable words in your passwords. Enable two-factor authentication (2FA) on your accounts whenever possible.

  9. Be careful where you click.

    cursor sign

    Be cautious when clicking on links or downloading attachments from unknown sources. These could potentially contain malware or phishing scams.

  10. Don't use pirated software.

    Shady Guide

    Avoid using Peer-to-Peer (P2P) file-sharing programs, keygens, cracks, and other pirated software that can often compromise your data, privacy, or both.

To avoid potential dangers on the internet, it's important to follow these 10 basic safety rules. By doing so, you can protect yourself from many of the unpleasant surprises that can arise when using the web.

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