KB4561621 updates Windows 10 1803 to Build 17134.1550

June Patch Tuesday is here and Microsoft pushed out a new cumulative update KB4561621 for Windows 10 version 1803. With this security update, the version number of Windows 10 1803 is increased to Build 17134.1550. The company has worked on the improvement of security for the input devices, Windows basic operations, and more. Apart from the changes, the team also worked on the problem that stops users from updating .msi files from a network folder. 

You are able to download KB4561621 as a .msu file format from the Microsoft update catalog site. It is always recommended to upgrade the system to the latest version so that it can be more protected from malicious software. To do that, open Settings > Update & Security > Windows Update > Check for updates. In order to access the complete patch list, visit Windows 10 Cumulative Updates.

KB4561621 updates Windows 10 1803 to Build 17134.1550

General Fixes and Improvements on KB4561621

The Key changelog is as follows –

  • The Developer team tries to fix an issue that prevents users from updating .msi files from a network folder. 
  • Furthermore, Microsoft brings security updates for the following Windows Components – 
Microsoft Scripting Engine, Microsoft Edge, Internet Explorer, Windows App Platform 
and Frameworks, Windows Media, Windows Kernel, Microsoft Graphics Component, Windows 
Input and Composition, Windows Shell, Microsoft Xbox, the Microsoft Store, Windows 
Cloud Infrastructure, Windows Fundamentals, Windows Management, Windows Authentication,
Windows Cryptography, Microsoft HoloLens, Windows Virtualization, Windows Storage 
and Filesystems, Windows File Server and Clustering, Windows Hybrid Storage Services,
Windows Update Stack, and the Microsoft JET Database Engine.

KB4561621 Known Issues

As of now, the company is not aware of any known issues.

How to get this update

Before proceeding further, make sure to install the following Servicing stack updates on your PC-

1. Through Windows Update

You will auto receive the new patch update KB4561621 on your respective Windows 10 version 1803 through Windows Update. Additionally, you may download the patch update manually as well by visiting the following address –

Settings (Win+I) > Update & Security > Windows Update

After that, click on the Check for Updates button.

2. Through the Update Catalog

Download the Standalone Package for Windows 10 version: 1803

3. Via Windows Server Update Services (WSUS)

If you configure Products and Classifications as described below, KB4561621 will auto-synchronize with WSUS.

  • Product: Windows 10
  • Classification: Security Updates

SourceMicrosoft Update Catalog