Windows 10 KB5055612 OS Build 19045.5796 (preview) Update is available for download. This optional, non-security update resolves a case-sensitivity issue with GPU paravirtualization checks in Windows Subsystem for Linux 2 (WSL2), which could previously cause failures in GPU support. It also expands the Windows Kernel Vulnerable Driver Blocklist (DriverSiPolicy.p7b) to include more drivers exploited in Bring Your Own Vulnerable Driver (BYOVD) attacks, to enhance system security. Additionally, it fixes a known issue where Event Viewer displayed an error related to the System Guard Runtime Monitor Broker service (SgrmBroker.exe).
Also, Microsoft reminded that after October 14, 2025, it will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Invites compatible devices to upgrade to Windows 11 for the latest features, bug fixes, and improvements. The patch is rolling out via Windows update as an optional update and you have to start the installation manually. Also, Windows 10 KB5055612 download links are published on the Microsoft Update Catalog here.
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Windows 10 KB5055612 Download
Today’s update is optional, meaning that if you check for updates in Windows Update, you’ll be given the option to download and install it. If you don’t take it, it won’t automatically install it. Instead, the fixes will be bundled into next month’s Patch Tuesday update, which will install automatically.
If you want to download and install Windows 10 KB5055612 OS Build 19045.5796.
- Press the Windows key + X and select Settings.
- Go to Windows Update and Security, then Windows Update
- Now hit the Check for Updates button. If you see optional quality updates available, click on Download and Install.
- Once it is complete, you need to restart your PC to apply the changes.
Windows 10 KB5055612 download offline installer link here.
Note-
- The above link opens the Microsoft Update Catalog, which is the library of Windows Update offline installers.
- To get started, click on the ‘Download’ button next to the OS version installed on your machine and run the .msu files to begin the update’s installation.
If you are looking for the Latest Windows 11 ISO image, click here.
Windows 10 KB5055612: What’s new?
This update resolves a case-sensitive GPU paravirtualization bug in WSL2, which helps developers running AI, machine learning, or graphical tasks in WSL.
Updates the Windows Kernel Vulnerable Driver Blocklist (DriverSiPolicy.p7b) to include drivers vulnerable to Bring Your Own Vulnerable Driver (BYOVD) attacks. These attacks exploit flawed drivers to gain elevated privileges, and the updated blocklist prevents such drivers from loading, enhancing system security.
Addresses a known issue from January 2025 updates (e.g., KB5049981), where the SgrmBroker.exe service caused an Event 7023 error in Event Viewer (“The System Guard Runtime Monitor Broker service terminated with error: %489660935”).
This update also includes miscellaneous security improvements to internal Windows OS functionality. Includes performance tweaks, such as improved memory management and hardware compatibility.
Furthermore, after installing this update, compatible devices may receive a message prompting to upgrade to the latest Windows 11.
Known Issues in KB5055612
Microsoft has acknowledged a known issue and is actively working on resolution:
- Citrix Compatibility Issues: Devices with certain Citrix components, such as Citrix Session Recording Agent (SRA) version 2411, may fail to install the January 2025 Windows security update.
You can read the complete change log on the Microsoft support site here.
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