Microsoft has released the .NET Framework 3.5 and 4.8 cumulative update for Windows 64-bit systems 10 May 2019 Update (version 1903) and Windows Server 2019 (1903) – KB4502584
Microsoft released the cumulative .NET Framework update KB4502584 for Windows 10 Insider Preview version 1903 (May 2019 Update) based on x64 (amd64) processors and Windows Server (1903) for x64-based systems.
For Windows 10 (version 1903), the cumulative update KB4501375 (Build 18362.207) and the update of the service stack KB4506933 are also available.
Installing via Windows Update
Cumulative update 4502584 for PC is installed via Windows Update. To test, go to the Options > Update and Security menu and click Check for updates. To complete the installation, you will need to restart the computer.
Installing and configuring Windows 10 updates
Download update KB4502584
You can also download the update from the Microsoft Update Catalog and install it manually using the link below:
To install an MSU file, simply double-click on the file. You can apply additional parameters (for example, /silent for a background installation) —the installation of the MSU update package.
Improvements and fixes KB4502584
Details are available at support page.
You can download the file below:x64 download update
Windows Server 2019 download update