Microsoft has released cumulative update KB4502564 for Windows 10 October 2018 Update (version 1809), Windows 10 LTSC 2019 and Windows Server 2019 (1809), which fixes errors in the .NET Framework 3.5 and 4.8
Microsoft has released KB4502564 – the cumulative .NET Framework 3.5 and 4.8 update for Windows 10 version 1809 (October 2018 Update) and Windows 10 LTSC 2019 based on x86, x64 (amd64) processors, and also Windows Server 2019 (1809) for systems based on processors x64
For Windows 10 (version 1809), the cumulative update KB4509479 (Build 17763.593) and the cumulative update .NET Framework 3.5 and 4.7.2 KB4502559 are also available.
Installing via Windows Update
Cumulative update 4502564 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 KB4502564
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 KB4502564
Details are available at support page.
You can download the file below:x64 download update
x86 download update
Windows Server 2019 download update