Microsoft released KB4511555, the cumulative update for the .NET Framework 3.5 and 4.8 for the Windows 10 May 2019 Update (version 1903) and Windows Server 2019 (1903)
Microsoft has released the cumulative .NET Framework update KB4511555 for Windows 10 version 1903 (May 2019 Update) based on x64 processors (amd64), ARM64 and Windows Server 2019 (1903) for x64-based systems.
For Windows 10 (version 1903), the cumulative update KB4512941 (Build 18362.329) and the service stack update KB4515530 are also available.
Installation through Windows Update
Cumulative Update 4511555 for PC installs through Windows Update. To check, go to the menu Options > Update and Security and press Check for Updates.
To complete the installation, you will need to restart your computer.<
Install and configure Windows 10 updates
You can also download the update from the Microsoft Update Catalog and install it manually at the link below:
To install the MSU file, just double-click on the file. You can apply additional parameters (for example, /silent for a background installation) – installing the MSU service pack.
Improvements and bug fixes KB4511555
Details are available at support page.
You can download the file below:x64 download update
x86 download update
Windows Server 2019 download update