KB4577671 causes update errors with Windows 10 1903/1909

It’s October Patch Tuesday! month of October Patch Updates for Tuesday were released just recently, and everyone is now looking at the changes that affect their OS.

The key features were made available to every version that came with KB4577671 Windows 10, however there are some major differences between versions, particularly the earlier versions, Windows 10 v1507, and the most recent, Windows 10 v2004.

As you could have guessed, specific version from Windows 10 have received more scrutiny, while others have were found to have more issues following the update.

That’s exactly what’s happening of KB4577671 This monthly cumulative upgrade to Windows 10 v1909.

The KB4577671 update could remove certain optional features


This patch could cause the same issue on Windows 10 version 1903, not just v1909, and it can have the same effect.

Microsoft mentions in its Release Note that when you attempt to update to both of the above stated Windows 10 versions, you might encounter a dialog with the name What’s in need of your attention on the right.

This dialog may be followed by an error message, continuing with the install of Windows will disable some of the optional features. You might need to include them again in Settings following the installation has completed.

This error can be seen when you attempt to upgrade from an earlier Windows 10 KB4577671 version to versions 1903 or 1909.

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Microsoft provides further details about the potential cause for this problem:

It is possible to encounter this compatibility error when local system accounts are restricted by firewalls from connecting to the internet using HTTP.

This is caused by Windows 10 Setup Dynamic Update (DU) inability to download required packages. not able to download the required software.

The Redmond giant hasn’t provided an answer to this issue however, it has promised to come up with a solution and release an update in the near future.

Windows 10 KB4577671 (Build 18363.1139) Full Changelog


In the changelog that Microsoft has released, Microsoft is making security enhancements in Office software, as well as the user names, passwords, as well as the fundamental operations within the OS.

For those who are still running Windows 10 version 1903 and 1909, Microsoft is rolling out the latest patch that includes many improvements. The patch is accessible via Windows Update and WSUS, however Microsoft has also released direct download hyperlinks in the case of Windows 10 KB4577671 offline installers.

Windows 10 Build 18363.1139 also resolves a problem that causes apps to start in an unintentional repair mode.

Another issue has been addressed that could cause your device to have problems rendering high dynamic range in 4K (HDR) content. You might notice dark content on certain devices.

Additionally, Microsoft is rolling out fixes to fix a problem that causes a device to crash when you use it with the pen for a long period of time.

Microsoft is also confirming that the current Patch Tuesday release currently comes with at least two known bugs. The first issue that was revealed in the last month caused a compatibility report dialog’ and is believed to prevent devices from installing any new features updates.

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Windows 10 KB4577671 is a part of the Patch Tuesday rollout and it contains both security and non-security corrections. The update will be downloaded and installed in a timely manner if you quit Windows Update to get updates according to its own schedule.

Microsoft knows of a different problem that is known to hinder third-party drivers from being installed the drivers on your computer.

Be aware that if for any reasons you’re not able to install the patch or you’re experiencing issues with installing it, you’ll have the option to simply pause the process and wait for you can install the following Patch Tuesday (that will fix issues that are caused by the build 18363.1139 (or 18362.1139).

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