Ssudbus.sys Driver Memory Integrity Issue in Windows 11

Published by Nyau Wai Hoe - Updated on

While the release of Windows 11 brought forth a slew of new features and optimizations, there have been occasional issues encountered by users. One such issue faced by many is the inability to activate the “Memory integrity” feature in Core Isolation due to incompatible drivers, specifically the ssudbus.sys and ssudmdm.sys drivers. This article explains what these drivers are and offers steps on how to uninstall or rename them to fix the memory integrity issue in Windows 11 or Windows 10.

Also see: Memory Integrity Can’t Be Turned On (Windows 11)

Ssudbus.sys ssudmdm.sys Memory Integrity in Windows 11

What are ssudbus.sys and ssudmdm.sys?

The ssudbus.sys and ssudmdm.sys drivers are primarily associated with Samsung smartphones or tablets. When users connect a Samsung device to a Windows PC, these drivers are typically installed to ensure that the device communicates effectively with the computer.

ssudbus.sys ssudmdm.sys Samsung Electronics composite device driver

  1. Ssudbus.sys: This is the Samsung Composite Device Driver. It’s the piece of software that allows a Samsung mobile device to interact with the Windows environment, ensuring smooth data transfer and communication. It’s produced by Samsung Electronics Co. Ltd and is an integral part of the connectivity suite when Samsung devices are involved.
  2. Ssudmdm.sys: While not detailed above, it’s another driver that is closely related to Samsung mobile device management, likely catering to modem or data communication features of the devices.

These drivers, when outdated or incompatible, can interfere with the activation of the Memory Integrity feature, leaving users frustrated.

Linked issue: Wdcsam64_prewin8.sys Incompatible Driver in Windows 11

The Memory Integrity’s incompatible drivers issue in Windows 11

Windows 11 includes a security feature known as Core Isolation’s Memory Integrity. When activated, it can offer an added layer of protection against sophisticated attacks that seek to manipulate or exploit vulnerabilities in the PC’s memory. However, for this security measure to function optimally, it requires all drivers in the system to be fully compatible.

When users attempt to turn on Memory Integrity, they might encounter an error preventing its activation. Windows might identify “ssudbus.sys” and “ssudmdm.sys” as incompatible drivers. Given the nature of these drivers, the root cause typically traces back to previously connected Samsung mobile devices.

Ssudbus.sys Memory Integrity

Uninstall ssudbus.sys and ssudmdm.sys driver

Before making any drastic changes, it’s advisable to attempt uninstalling these drivers. Here’s a simple walkthrough:

  1. Right-click on the “Start” button and select “Device Manager”.
  2. In the Device Manager window, expand the section related to mobile devices or USB controllers (depending on where the Samsung drivers are located).Uninstall ssudbus.sys and ssudmdm.sys
  3. Look for any Samsung-associated drivers. Right-click on them and select “Uninstall device”.
  4. Restart your PC.

Related problem: Can’t Completely Uninstall a Driver in Windows 11 (Fix)

Rename ssudbus.sys and ssudmdm.sys in System32

If the problem persists, an alternative approach involves renaming the troublesome drivers, essentially preventing them from loading:

  1. Open File Explorer (usually found on the taskbar or accessed by pressing Windows key + E).
  2. Navigate to the following path: C:\Windows\System32 or C:\Windows\System32\drivers.
  3. In the search bar at the top-right corner, type “ssudbus.sys”. Once located, right-click on it and choose “Rename”. Add a .old extension so the name becomes ssudbus.sys.old.
  4. Repeat the same process for “ssudmdm.sys”.Delete ssudbus.sys and ssudmdm.sys incompatible drivers
  5. Restart your PC for the changes to take effect.

Useful tip: Run CMD or PowerShell as SYSTEM in Windows 11

Ssudbus.sys driver download and update

In case you still need these drivers (e.g., for connecting your Samsung device), it might be a good idea to download and install the latest versions, which could potentially be compatible with Windows 11’s Memory Integrity feature.

  1. Visit the official Samsung website and navigate to the “Support” section.
  2. Look for “Drivers and Downloads” and search for the latest driver associated with your specific Samsung device.Ssudbus.sys ssudmdm.sys driver download and update
  3. Download and install the updated drivers.
  4. Restart your PC.

Recommended resource: How to Install or Update Driver in Windows 11

Verifying if Memory Integrity can be turned on

Once you’ve addressed the driver issues, it is important to ensure that the Memory Integrity feature is enabled. Follow these steps to verify and turn on Memory Integrity:

  1. Open the Windows Security app.Open Windows Security Windows 11
  2. Click on Device security in the sidebar.Windows 11 Device Security
  3. Under Core isolation, click on Core isolation details.Windows 11 Memory Integrity

By now, the Memory integrity option should be visible to you. If it is currently accessible and enabled, it signifies that the ssudbus.sys and ssudmdm.sys drivers have been successfully removed or resolved, and Memory Integrity is operating as intended. Your system is now equipped with an additional layer of protection against advanced malware threats.

Nevertheless, if the Memory integrity option remains disabled or inaccessible, it is advisable to verify once again if any Samsung software or drivers associated with these drivers have been entirely uninstalled.

Final thoughts

Navigating through the labyrinth of drivers and system features can be tricky at times. While Windows 11 promises a leap in user experience and security, incompatibilities like these underline the importance of keeping drivers updated. Moreover, manufacturers and OS developers must work in harmony to ensure smooth transitions and operations for the end-users.

By following the steps above, you can hopefully resolve the Memory Integrity activation issue caused by Samsung’s ssudbus.sys and ssudmdm.sys drivers and enable the full security potential of Windows 11.

Nyau Wai Hoe
Nyau Wai Hoe is the Founder and Chief Editor of With a degree in software engineering and over 12 years of experience in the tech support industry, Nyau has established himself as an expert in the field, with a primary focus on the Microsoft Windows operating system. As a tech enthusiast, he loves exploring new technologies and leveraging them to solve real-life problems.

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