Note: We have updated offline installer links. You can now download updates offline.

Microsoft has released a new Cumulative Update KB3189866 and KB3185614 for Windows 10 users. But few users reporting that new cumulative update KB3189866 and KB3185614 fails to install or stuck midway. Check out below to fix this issue.

1. Type ‘Troubleshooting’ in the search. Now select View All in left side panel. Select ‘Windows Update’ at the end of the open window. Run the troubleshooting. Restart your and try to update again.

2. If cumulative update KB3189866 and KB3185614 stuck during download or fails to install, it might be that something went wrong with the file itself. Clearing the folder where all of the update files are stored will force Windows Update to download a fresh.


Go to C:\Windows\SoftwareDistribution\Download  and delete everything within the folder, but do not delete the folder itself. To do so, press CTRL + A to select everything and then press Delete to remove the files. Restart and download updates again.

3. If that doesn’t fix Cumulative Update KB3189866 and KB3185614 problem. Simply Download the standalone installer and install it by yourself. To know how to install CAB or MSU files, read here.

If you have installed earlier updates, only the new fixes that are contained in this package will be downloaded and installed on your computer.


  1. None of these solutions are working having trouble installing KB3185614, I only see it reach 2% than it restarts and gives me that fail undo changes message.

  2. is same happen to me. even i update using the offline installer. it show me this error “Security Update for Windows (KB3185614) is not installed.”


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