Optional update KB4550945 available for iron out bugs in Windows 10 version 1909 and 1903

New set of non security optional update KB4550945, KB4550969, KB4550944 available for all supported Windows 10 devices, here whats new.

By Gaurav P Last updated Jun 22, 2023 0

Recently Microsoft released the optional update KB4550945 for Windows 10 versions 1903 and 1909. Installing KB4550945 brings quality improvements, several bug fixes and raises Windows 10 1903 to build 18362.815, while Windows 10 1909 reaches build 18363.815. Also, a new update KB4550969 (OS Build 17763.1192) available for Devices still running older windows 10 version 1809 aka October 2019 update with several non security fixes and improvements as well.

Post Contents :-

1 Download Windows 10 KB4550945
- 1.1 Windows 10 Build 18363.815 changelog
- 1.2 Windows 10 Build 17763.1192 changelog

Download Windows 10 KB4550945

The KB4550945 update has been released as part of the optional monthly “C” version. Means Microsoft will not install it on your device automatically,If you want to download and install Windows 10 Build 18363.815, you need to check for updates manually and then click on ‘Download and install now’ option in Settings > Update & Security. Once installed you need to restart your PC to apply the changes. After that you can use winver command to check the current build number.

Note: Microsoft reserved, the first week of each month is for Office updates, the second week (B) is for Patch Tuesday releases. C and D weeks, which are the third and fourth weeks of the month, are reserved for optional updates.

You can download the updates to install them manually for version 1903 with the links below:

KB4550945 64-bit | Download
KB4550945 32-bit | Download

If you’re running version 1909, use these links:

KB4550945 64-bit | Download
KB4550945 32-bit | Download

If you are looking for windows 10 version 1909 ISO get it from this link.

Windows 10 Build 18363.815 changelog

As per Microsoft official blog Installing KB4550945 bumps to Windows 10 Build 18363.815 and fixes a problem that causes Windows Update to stop responding when checking for updates. In addition, this update addresses a bug that prevents certain applications from opening after an upgrade.

With the latest update, KB4550945 for windows 10 1909 has resolved another bug that turns off notifications for devices with VPN or cellular network with prior warning. Resolved preventing customers from resuming Xbox games on Windows has been resolved in this release.

Here the complete changelog of Windows 10 KB4550945listed Microsoft official blog:

Addressed an issue that prevented certain applications from starting after upgrading from previous versions of Windows.
Addressed an issue that turned off notifications for devices that use VPNs on a cellular network.
Addressed an issue that prevented the resuming of Xbox games on Windows after upgrading from previous versions of Windows.
Addressed an issue that caused boxes with multiple lines of text to stop responding.
Addressed an issue that prevented the touch keyboard from showing up during sign-in.
Addressed an issue that prevented the touch keyboard from opening in UWP apps when USB devices were connected.
Addressed an issue that displayed incorrect folder properties when the path is longer than MAX_PATH.
Addressed an issue that prevented the “correct” lock screen from appearing.
Addressed an issue that generated unexpected notifications related to changing the default application settings.
Addressed a sign-in screen being blurry issue.
Addressed a Windows Update issue that caused it to stop responding when checking for updates.
Addressed an issue that prevented the Sign-in optinos page from opening when using the ms-settings:signinoptions-launchfingerprintenrollment URI.
Addressed a Bluetooth group policy setting issue on Microsoft Surface Pro X devices.
Addressed a KERNEL_SECURITY_CHECK_FAILURE (139) stop error on resume from sleep when certain Bluetooth headsets are turned on.
Addressed a reliability issue in WDF01000.sys.
Addressed a logman.exe error that threw the error “A user account is required in order to commit the current Data collector Set properties”.
Addressed an issue that prevented administrators from setting REG_EXPAND_SZ keys in some automated scenarios.
Addressed a memory leak in LsaIso.exe.
Addressed an issue that caused the Trusted Platform Module initialization to fail.
Addressed an issue that prevented hash signing using Microsoft Platform Crypto Provider for TPMs from working correctly.
Addressed an issue that prevented programs running in Azure Active Directory environments from receiving account change notifications.
Addressed an issue that caused the system to stop working with a 0x3B stop code when running binaries with revoked certificates.
Addressed a Windows Defender Application Control policies merging issue.
Addressed an issue that prevented users from changing their PIN after connecting a device to Microsoft Workplace Join.
Addressed a printing issue that prevented content outside of margins from being printed.
Addressed a Microsoft Internet Information Services management tools issue that prevented the managing of ASP.NET applications if these had SameSite cookie settings in web.config.
Addressed a Microsoft Edge issue that caused it to stop working when attempting to paste when cut and paste functionality has been disabled using a policy and Windows Defender Application Guard was active.
Addressed a Clipboard service issue that caused it to stop working when signing out.
Addressed a black screen in the Windows Virtual Desktop issue during sign-in.

Windows 10 KB4550945 known issues:

Microsoft is not currently aware of any issues with this update, but few users reported that they are facing problems while installing this update on their computers. Some other users also reported the Blue screen of death, Boot failures, WiFi connectivity problems after installing this update.

If you are one of those unlucky users facing problems after installing this update then Uninstalling the KB4550945 update is one of the most effective ways to fix the problems caused by this update. You can follow these simple steps to uninstall the update.

Go to Settings and click “Update and Security.”
Choose “Windows Update” and open “View update history.”
Click “Uninstall updates.”
Locate the latest update and uninstall it.
Lastly, Reboot your device.

Windows 10 Build 17763.1192 changelog

Devices still running older Windows 10 version 1809, aka October 2019 update will receive update KB4550969 that bumps Windows 10 Build 17763.1192 and bring following non security fixes.

Addresses an issue that occurs when a third-party application loads hidden tabs into Internet Options.
Addresses an issue with pasting mixed content of images and text from Microsoft Word into Internet Explorer.
Addresses an issue that causes a box that contains multiple lines of text to stop responding in certain scenarios.
Addresses an issue that prevents the first key stroke from being recognized correctly in the DataGridView cell.
Addresses an issue that causes an application that uses msctf.dll to stop working, and the 0xc0000005 (Access violation) exception appears.
Addresses an issue that prevents the correct lock screen from appearing when all of the following are true:
The Group Policy Object (GPO) policy “Computer Configuration\Windows Settings\Security Settings\Local Policies\Security Options\Interactive Logon: Do not require Ctrl+Alt+Del Computer” is disabled.
The GPO policy “Computer Configuration\Administrative Templates\System\Logon\Turn off app notifications on the lock screen” is enabled.
The registry key HKLM\SOFTWARE\Policies\Microsoft\Windows\System\DisableLogonBackgroundImage is set to 1.
Addresses a reliability issue in WDF01000.sys.
Addresses an issue that causes a KERNEL_SECURITY_CHECK_FAILURE (139) stop error when Windows resumes from Sleep and turns on certain Bluetooth headsets.
Addresses an issue that causes the Event Viewer Microsoft Management Console (MMC) to stop working when the secondary monitor is above the primary monitor. An out of bounds exception appears.
Addresses an issue that causes an error in logman.exe. The error is, “A user account is required in order to commit the current Data collector Set properties.”
Addresses an issue that prevents users from setting the REG_EXPAND_SZ keys in some automated scenarios.
Addresses an issue that causes a memory leak in the LsaIso.exe process when the server is under a heavy authentication load and Credential Guard is enabled.
Addresses an issue that prevents hash signing using the Microsoft Platform Crypto Provider for TPMs from working correctly. This issue might also affect networking software, such as VPN applications.
Addresses an issue with merging Windows Defender Application Control policies that sometimes generates a duplicate rule ID error and causes the Merge-CIPolicy PowerShell command to fail.
Addresses an issue that prevents a user’s PIN from being changed after connecting the device to Microsoft Workplace Join.
Addresses an issue that prevents applications running in an Azure Active Directory environment from receiving account change notifications. This occurs when using the Web Account Manager (WAM) and the WebAccountMonitor API.
Addresses an issue that fails to print content that is outside of the margins of a document.
Addresses an issue that prevents Microsoft Internet Information Services (IIS) management tools, such as IIS Manager, from managing an ASP.NET application that has configured SameSite cookie settings in web.config.
Addresses an issue that causes high CPU usage on Active Directory (AD) domain controllers when migrating to Windows Server 2019. This increases latency in Microsoft Exchange operations, causes Managed Store contention, and severely impacts index creation in Active Directory and the Global Catalog’s performance.
Addresses an issue that logs incorrect Internet Protocol (IP) addresses in the audit logs because of missing or old data for active requests coming from “windowstransport/usernamemixed/certificatemixed” endpoints.
Addresses an issue that causes devices that are provisioned for Windows Hello for Business (WHfB) to fail. Registration occasionally fails, which leads to a delay in WHfB enrollment and, in some instances, creates Conflicting Objects (CNF) in the Active Directory “Registered Device” container.
Addresses an issue that might cause a deadlock in the Remote Desktop Gateway service.
Addresses an issue that might cause the Remote Desktop Gateway service to stop working.
Addresses an issue that causes systems to stop working with a 0x3B stop code when running a binary that is signed by a revoked certificate.
Addresses an issue that prevents the Notification State registries from being deleted for certain apps even after the user profile is deleted.
Addresses an issue that causes stop error 0x18 (REFERENCE_BY_POINTER) when Remote Desktop sessions redirect devices that are not input devices.
Addresses an issue that displays a black screen to Windows Virtual Desktop users when they attempt to sign in.
Addresses an issue that prevents you from enabling the Japanese Input Method Editor (IME) in applications that do not have terminal server awareness when they connect to a computer using the Remote Desktop Service.

KB4550969 Known issue:

Microsoft has acknowledged devices with some Asian language packs installed may receive the error,

“0x800f0982 -PSFX_E_MATCHING_COMPONENT_NOT_FOUND.”

As a workaround, Microsoft suggests, Uninstall and reinstall any recently added language packs. Select Check for Updates and install the April 2019 Cumulative Update.

If reinstalling the language pack does not mitigate the issue, reset your PC as follows:

Go to the Settings app > Recovery.
Select Get Started under the Reset this PC recovery option.
Select Keep my Files.

The Windows 10 April 2018 Update, version 1803, has reached the end of support but still the company has released update KB4550944 to address a number of problems while bumping the version number to build 17134.1456.

Note: If you encounter any problem installing these updates here read our Windows update troubleshooting guide.