Microsoft has released KB5055612 (OS Build 19045.5796), a preview for Windows 10 Home and Pro 22H2, Windows 10 Enterprise Multi-Session 22H2, Windows 10 Enterprise and Education 22H2, and Windows 10 IoT Enterprise 22H2. This is a non-security update that introduces quality enhancements to the internal functionality of the Windows operating system.
The main updates in this release include a solution for checking GPU paravirtualization in Windows Subsystem for Linux 2 (WSL2), improvements to the Windows Kernel Vulnerable Driver Blocklist, and a fix for a problem with the System Guard Runtime Monitor Broker service. The update integrates the most recent servicing stack update (SSU) for the operating system alongside the latest cumulative update (LCU), enhancing the reliability of the update process and resolving potential issues that may arise during the installation of updates.
April 22, 2025—KB5055612 (OS Build 19045.5796) Preview
This non-security update includes quality improvements. Below is a summary of the key issues that this update addresses when you install this update. If there are new features, it lists them as well. The bold text within the brackets indicates the item or area of the change we are documenting.
Highlights
[Internal Windows OS] This update contains miscellaneous security improvements to internal Windows OS functionality.
Improvements
Important: Use EKB KB5015684 to update to Windows 10, version 22H2.
[Graphics] Fix: The check for GPU paravirtualization was case-sensitive in Windows Subsystem for Linux 2 (WSL2). This issue might potentially cause GPU paravirtualization support to fail.
[OS Security] Updates to the Windows Kernel Vulnerable Driver Blocklist (DriverSiPolicy.p7b). Additions have been made to blocklist drivers with security vulnerabilities that have been used in Bring Your Own Vulnerable Driver (BYOVD) attacks.
[System Guard Runtime Monitor Broker service (Known issue)] Fixed: The Windows Event Viewer might display an error related to SgrmBroker.exe, on devices that have installed Windows updates released January 14, 2025, or later. This error can be found under Windows Logs > System as Event 7023, with text similar to ‘The System Guard Runtime Monitor Broker service terminated with the following error: %%3489660935’.
If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.
Servicing stack update (KB5055663) - 19045.5789
Microsoft now combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing updates.
This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. To learn more about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
April 22, 2025—KB5055612 (OS Build 19045.5796) Preview - Microsoft Support
