Fix: KB3189866 Update for Windows 10 Stuck

On the 13th of September, Microsoft released three cumulative updates for Windows 10 (KB3189866, KB3185614, and KB3185611). Since the release, many users reported that update KB3189866 gets stuck at 45% or 95% or any % between the two and won’t complete the download.

After thoroughly assessing various threads and user suggestions we’ve combined a couple of solutions which will help get the ball rolling and allow the update to finish downloading.


Method 1: Patience

Let the update run for 4-5 hours, and wait for it to complete the download. Since the update was recently pushed, it is possible that many Windows 10 systems are attempting to download the update from the Windows (Update) servers which may have overloaded the server, and put many in the que.

If it still won’t start or finish after 4-5 hours or if you’ve already been waiting for 5 hours or more, then proceed with Method 2.

Method 2: Clear SoftwareDistribution

Hold the Windows Key and Press X. Choose Command Prompt (admin) and type the following two commands in the command prompt window.

net stop bits
net stop wuauserv

Once done, Hold the Windows Key and Press R. Type C:\Windows\SoftwareDistribution in the run dialog and Click OK.

Delete everything from the SoftwareDistribution folder, go inside each folder and delete whatever that can be deleted (some files that are actively being used may not delete, but it wont be an issue since we’ve stopped the windows update service).


Once done, click one of the links below depending on your system-type and install the update manually after it has been downloaded.

Windows 10 1607 14393.187 x64: Windows10.0-KB3189866-x64.msu (64-bit)

Windows 10 1607 14393.187 x86: Windows10.0-KB3189866-x86.msu (32Bit)

Method 3: Clean Up Start Components

If the update still won’t install, then do the following steps and re-run the manually downloaded update. First, Hold the Windows Key and Press X. Choose Command Prompt (Admin) and Click OK.

Type the following command in the command prompt window and then press ENTER.

Dism /Online /Cleanup-Image /StartComponentCleanup

Wait for the dism command, to clean up start up components. Once done, re-run the downloaded update.


Kevin Arrows
Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.

Expert Tip

Fix: KB3189866 Update for Windows 10 Stuck

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