Microsoft rolled out a new cumulative update, KB5055518, which advances Windows 10 versions 22H2 (build 19045.5737) and 21H2 (build 19044.5737). This is part of Microsoft’s April 2025 patch Tuesday Update focus on critical security patches and system enhancements, including one actively exploited zero-day flaw and 134 other security issues. Windows 10 KB5055518 also introduces new Noto CJK Fonts for better language support, enhances security with updated protocols, improves system reliability, and fixes issues like printer malfunctions and File Explorer glitches. Also, KB5055519 (OS Build 17763.7136) is available for Windows 10 version 1809 with a few security enhancements and includes support for a DST adjustment in the Aysen region of Chile, reflecting government changes for 2025.
Since Windows 10 is no longer Microsoft’s primary operating system or priority, you won’t find any big changes in the latest updates or forthcoming cumulative releases. Microsoft recommends upgrade Windows 11 for free to get the latest features and enhancements
What’s New in Windows 10 KB5055518
While the KB5055518 update is primarily security-focused, it introduces a couple of notable features:
- Noto CJK Fonts: Microsoft has added support for Noto CJK (Chinese, Japanese, and Korean) fonts, enhancing language support for users who rely on these character sets. This addition ensures better readability and compatibility for multilingual environments, particularly benefiting users in East Asia.
- EEA Compliance for Windows Search: In line with European Economic Area (EEA) regulations, Windows Search now integrates web search providers and opens search results in the user’s default browser. This change aligns with regional compliance requirements, offering a more seamless and user-centric search experience.
- Secure Temporary File Storage: To improve security, system processes can now store temporary files in a protected directory at C:\Windows\SystemTemp. This is accessible via the GetTempPath2 API or .NET’s GetTempPath API, reducing the risk of unauthorized access to sensitive temporary data.
- Daylight Saving Time (DST) Updates: The update includes support for a DST adjustment in the Aysen region of Chile, reflecting government changes for 2025. This ensures accurate timekeeping for users in affected regions.
- Security Updates: As part of the April 2025 Patch Tuesday, KB5055518 addresses one actively exploited zero-day vulnerability and 134 additional security flaws. These patches are critical for safeguarding systems against ransomware, exploits, and other malicious attacks, though specific details are available in Microsoft’s Security Update Guide.
Beyond new features, KB5055518 delivers a range of improvements and fixes to enhance system stability and functionality:
- Resolves an issue with USB-connected dual-mode printers that printed garbled or random text, ensuring reliable printing for affected users.
- Addresses bugs impacting File Explorer, such as thumbnail display issues, improving navigation and file management.
- Fixes connectivity problems in Remote Desktop sessions, enhancing reliability for remote workers and IT administrators.
- Corrects a bug where the OpenSSH service failed to start, restoring secure shell (SSH) functionality for users relying on this protocol.
- Incorporates quality improvements from the March 25, 2025 preview update (KB5053643), refining system performance and reliability.
While KB5055518 is a robust update, it comes with two documented known issues:
- Devices with certain Citrix components, particularly the Citrix Session Recording Agent (SRA) version 2411, may fail to install this update or the January 2025 security update.
- An erroneous Event 7023 error related to SgrmBroker.exe (System Guard Runtime Monitor Broker) may appear in the Event Viewer.
Download Windows 10 KB5055518
Since this is a mandatory security update, it will eventually install automatically via Windows Update. You only need to reboot your device to apply the changes.
- Right-click on the start menu, select settings,
- Go to Update & Security, then Windows Update,
- Now click the Check for updates button, and you will notice 2025-04 Cumulative Update for Windows 10 Version 22H2 for x86-based Systems (KB5055518) started downloading.
- Once done, you need to restart your PC to apply the updates. After installing today’s update, advance to Windows 10 build 19045.5737, you can check the same using winver command.
Alternatively, you can download the offline installer from the Microsoft Update Catalog and manually install the update.
- Visit the Microsoft Update Catalog.
- Search for “KB5055518” and select the appropriate version (e.g., 32-bit, 64-bit, or ARM64) based on your system.
- Download the .msu file, double-click it to run the installer, and follow the prompts. Restart your device to complete the process.
And if you are looking for Windows 10 version 22H2 ISO image, you can get it from here.
Windows 10 KB5055518 update Direct Download Links: 64-bit and 32-bit (x86).
The above link opens the Microsoft Update Catalog, which is the public library of Windows Updates released in the past. You can click on the ‘Download’ button next to the version of Windows you’ve installed and begin the download by clicking on .msu link which appears in the next pop-up.
If you encounter any problem installing these updates here read our Windows update troubleshooting guide.
