Fix : Cumulative Update KB3189866 stuck (at 45%, 95% etc.) on Windows 10

Microsoft has released Cumulative Update for Windows 10 version 1607 (KB3189866) and is available for download via the Window Update. For some, the update download was stuck at some figure. KB3189866 is a security update that includes several improvements and fixes in the functionality of Windows 10 Version 1607 & also patches several vulnerabilities. And it is therefore recommended that you install it soonest.


If you are facing issues while downloading or installing, you may want to see if these two suggestions help you:

  1. Run the Windows Update Troubleshooter,
    • Press the windows button on your keyboard and search for “Troubleshooting” verdict_troubleshoot_update.jpg
    • The control panel will open up, select “Fix problems with Windows update” and follow the onscreen instructions.
  2. Delete the contents SoftwareDistribution folder. The Software Distribution folder is situated in the following location in File Explorer:

Having done this, try and see if you can update your Windows 10 successfully. However if you want a simple way out you can just download the updates manually. Basically, by manually downloading the cumulative update, you skip the automatic downloading process that freezes for so many users, so you can safely proceed with the installation once you do that.

Manually downloading the Windows 10 cumulative update KB3189866 from the Microsoft Catalog or using the links at the end of the article seems to solve everything, so give this method a try and let us know how it goes.

  1. Visit Microsoft Update Catalog page using Internet Explorer (yes it is present in Windows 10, search for it), and search for KB3189866
  2. Depending on Windows 10 version you’re using click on ‘Add’ button first x64 or the last one. For instance, if you’re using 64-bit Windows 10, click on Add button for ‘Cumulative Update for Windows 10 version 1607 for x64-based systems (KB3189866)’, and further click on the Download button, browse and choose the download location for updates to be downloaded to your computer msupdatecatalogverdict.png
  3. Once downloading completes, run it, install on your computer and restart the system when the installation is over. microsoft-update-catalog-downloading-kb3189866-1
  4. After the restart, visit Settings > Update & Security and check ‘Update History’ to know about the KB3189866 installation status.

Alternatively, you can download the updates from the links provided below directly if you dread firing up Internet Explorer.

At the time of writing this article, Microsoft is yet to acknowledge the bug, although there’s no doubt that the firm is aware of it. There are plenty of complaints posted online, including on Microsoft’s own Community forums, and since the update isn’t pulled just yet, more users are very likely to experience the issue and search for workarounds.

Are you facing this problem? And did this post help you? Do let us know.

3 thoughts on “Fix : Cumulative Update KB3189866 stuck (at 45%, 95% etc.) on Windows 10

Add yours

  1. updating kb3189866(64 431mb) stuck at 45%, and it crashed, not know the problem, only use your last link it works for me, thanks
    each time updating win 10, system getting slower while all other remaining same,
    it took me 5 or 6 hrs to get it done, this, this is way too much for a little guy like me

    Liked by 1 person

Leave a Reply

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

Powered by

Up ↑