All other older versions of Windows 10 will receive patches today, too. The only version not getting fixes is version 1511. Here’s a look at what you will get.

KB4517389 for Windows 10 1903 May 2019 Update

As is usually the case for cumulative updates, there are no new features to report. But today’s update will bump your build to version 18362.418 and includes the following fixes and improvements:

Addresses an issue in security bulletin CVE-2019-1318 that may cause client or server computers that don’t support Extended Master Secret (EMS) RFC 7627 to have increased connection latency and CPU utilization. This issue occurs while performing full Transport Layer Security (TLS) handshakes from devices that don’t support EMS, especially on servers. EMS support has been available for all the supported versions of Windows since calendar year 2015 and is being incrementally enforced by the installation of the October 8, 2019 and later monthly updates.Addresses an issue with applications and printer drivers that utilize the Windows JavaScript engine (jscript.dll) for processing print jobs.Security updates to Windows Shell, Internet Explorer, Microsoft Edge, Windows App Platform and Frameworks, Windows Cryptography, Windows Authentication, Windows Storage and Filesystems, Windows Kernel, Microsoft Scripting Engine, and Windows Server.

Windows Update Notes

If you have automatic updates enabled, you should see the updates in the next couple of days. Or, if you want to stay on top of things, head to Settings > Update & Security > Microsoft Update and check. Or, you can manually install it by downloading it from the Microsoft Update Catalog.  Remember, a full system restart is required to complete the installation process. Older supported versions of Windows 10 are receiving patches today, too. Keep in mind that there are a few known issues with these updates, which vary depending on the version of Windows 10 you’re running. Make sure to read the Windows 10 Update History page for your release notes. If you have any problems after installing the update that isn’t resolved by Microsoft’s documented workarounds, you can roll the update back. For more on how to do that, please read our article: How to Uninstall Windows 10 Cumulative Update.