It’s Patch Tuesday and Microsoft have an update for the 1903 and 1909 releases of Windows 10. KB4540673 takes the build number to 18262.719 for 1903 and 18363.719 for 1909.
1903 and 1909 share the same servicing platform so the updates are the same for both releases to Windows.
Addresses an issue that prevents certain users from upgrading the OS because of corrupted third-party assemblies.
Security updates to Windows App Platform and Frameworks, Windows Media, Windows Silicon Platform, Microsoft Edge, Internet Explorer, Windows Fundamentals, Windows Authentication, Windows Peripherals, Windows Update Stack, and Windows Server.