KB4534321, KB4534308, KB4534318 Update Windows 10 1809, 1803, 1709

Windows 10  version 1809, 1803, and 1709 obtained the patches KB4534321, KB4534308, and KB4534318 on January 23.

KB4534321, KB4534308, KB4534318 Update Windows 10 1809, 1803, 1709 Pic 1

Microsoft just recently released a set of cumulative updates KB4534321, KB4534308 and KB4534318 respectively for Windows 10 1809, 1803 and 1709. These patches are quite important ones in that these contain a big bunch of important fixes and improvements, especially for the 1800 series.

These patches deal with several components and features including Windows Mixed Reality, the browsers, OOBE, APIC, Windows ecosystem and lot more. Thus, KB4534321, KB4534308, and KB4534318 are crucial and we’d recommend getting these patches as soon as you can- if you haven’t already!

KB4534321, KB4534308, KB4534318 changelog

Here are the key improvements and fixes that come with these off-time cumulative patches for 1809, 1803 and 1709 –

  • KB4534321 incorporates updates for a problem related to Windows Mixed Reality observed commonly after upgrading to a new Microsoft Edge version.
  • Makes progress on the trouble of device going into the Windows OOBE restart loop.
  • The patch deals with the complication where the Microsoft Windows Search Indexer issue causing it to add or repair required ACLs without checking if they exist.
  • Attempts to fix a problem with the Accounts page syncing settings when the Group policy “Continue experiences on this device” is disabled.
  • With this patch, the developer addresses an issue preventing singing software Indirect Display drivers with multiple certificates.
  • There’s an update on the problem with a ctfmon.exe memory leak.
  • Progresses in the issue which prevents the Language Bar from appearing when the user signs in to a new session in some cases. It happens even if the Language Bar is properly configured.
  • There’s a fix for a problem causing the touch keyboard to close whenever the user selects any key in some devices.
  • Fixes an issue that sometimes prevents you from reducing the window.
  • With these patches, Microsoft addresses a problem that automatically changes the Start menu’s user-customized order of tiles. This would happen even when the layout is locked or partially locked.
  • This update also focuses on a problem with incorrect permissions on the class registry keys of a user. This prevented some users from opening files, links or even some applications.
  • There is a fix for the situation of the unexpected closing of the Settings page.
  • Have an update on the problem of the unexpected closing of Windows Search. This would happen when a Group Policy applies subgroups to the Start menu layout.
  • The patch addresses an issue with the Windows Hello multifactor unlock policy of Windows Hello.
  • It also attempts to fix an issue preventing a remote PowerShell session job from reporting the end of the session on the target machine.

Other Fixes

  • With these patches, Microsoft fixes a problem with a handle leak in the EnableTraceEx2() function.
  • The updates also resolve an issue that stops launching Internet Explorer when Microsoft User Experience Virtualization is in use. It also strengthens the reliability of the UE-V AppMonitor.
  • There’s a fix for an issue preventing the “Local Security Authority Subsystem Service” process from working when you sign in using an updated UPN (user principal name). The following error code would be displayed, “0xc0000005 (STATUS_ACCESS_VIOLATION).”
  • KB4534321 addresses a problem observed with the Always-On Virtual Private Network (viz. VPN) which fails in removing the Name Resolution Policy Table (NRPT) rules even after disconnecting.
  • Also, these patches resolve trouble with AppContainer firewall rules which sometimes leak on user sign-in to Windows Server.
  • There is a fix for an issue resulting in some systems turning unresponsive with operating embedded MultiMediaCard (eMMC) storage devices.
  • With this patch, the developer fixed an issue causing the error “Move file failed with source <original_full_db_path> and Destination <new_full_db_path> with error 5 (Access is denied)” from ntdsutil.exe preventing you from moving Active Directory database files.
  • Updates available for an issue that results in the use of an incorrect number of bytes to execute backups across partitions, ultimately causing backup failure even with adequate space.
  • The patch attempts to bypass an issue that might lead the Application Virtualization (App-V) Streaming Driver (appvstr.sys) to leak memory. This happens when the users enable the Shared Content Store (SCS) mode.

Apart from these, the patch fixes a number of issues related to syncing, settings, I/O request queue, and APIC, Windows ecosystem, OOBE, Windows Hello, Group policies, Microsoft Defender, LVID, netdom.exe, and ESENT.

Known issues in KB4534321, KB4534308, KB4534318

Just as with most of the other patches, there are a few issues in these set of updates which remains without a permanent solution from Microsoft. However, the numbers of these troubles are stunningly low this time. And Microsoft suggests some workarounds to help users temporarily resolve those issues.

Problem 1

The common problem with these patches was the “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)” error which appears when performing certain operations on CSV files and folders. The issue appears particularly when the task is done from a process without administrative privileges or working from a node with CSV ownership.


The obvious workaround in the situation would be to not perform the operations from a node with CSV ownership or to perform the functions from a process with administrative privileges.

Problem 2

This is an issue with the patch KB4534321, not with the other two. The issue involves emerging of “0x800f0982 – PSFX_E_MATCHING_COMPONENT_NOT_FOUND” error in certain devices with some Asian language packs.


As a workaround, you can try uninstalling and reinstalling the language pack. If that doesn’t work, you must to reset this PC. These should be sufficient to deal with the issue for now. The developer is still attempting to bring out a permanent solution n some of the later updates.

How to get the KB4534321, KB4534308, KB4534318 Update for 1809, 1803, 1709?

There are a few different ways of having your Windows 10 updates with the latest patches. Users having the automatic update system of Windows 10 wouldn’t have to do anything. Windows will download as well as install the patches is relevant on its own. Anyway, if you do not receive timely updates or if you have to manually get them, here’s what to do:

  • Hit Win logo + I to directly open Windows Settings.
  • When the Settings application opens up, navigate to Update & Security.
  • Here, the Windows Updates subsection will be active by default.
  • Now, you’ll see a button for ‘Check for updates‘ on which you need to click. The OS will then list any latest available updates. Thereafter, simply hit Download and let the system scan and carry out the rest.

Yet another means of getting these patches would be fetching the stand-alone package of the relevant update from the Microsoft Update Catalog site.

Some important points to remember is to have a smooth update process is a good network and installation of SSUs. Ensure a stable and uninterrupted internet connection during the process. Also, it is highly recommended to ensure downloading of the latest Servicing Stack Updates before you get the cumulative ones, especially if you manually do the process.

Source – Release Note 1, Release Note 2Release 3

That’s all!!!

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Topics:  Windows update