Microsoft rolled out a Cumulative Update for Windows 10 Version 1803 (KB4343909) with OS Build 17134.228 on August 14, 2018. The update installs fine on most systems, but if you are having downloading/installing the update on your Windows 10 machine. Try the tips shared below:

Clear Windows 10 Update Cache

  1. Run Command Prompt as administrator:
    1. Click on the Start  button.
    2. Type cmd, right click on Command Prompt in the search result and select Run as Aministrator.
  2. Type the following command into the command prompt window and hit enter: 
    net stop wuauserv
  3. Make sure “Show hidden files” is turned off:
    1. Click on the Start  button.
    2. Type file explorer options, and select it from the search results.
    3. Click the View tab.
    4. Make sure Hidden files and folders setting is set to “Don’t show hidden files, folders, or drives.”
  4. Open File Explorer and navigate to the following directory: 
    C:WindowsSoftwareDistributionDownload
  5. Delete all contents of the above-mentioned Download directory.
  6. Run Command Prompt as Administrator again (as shown in Step 1 above).
  7. Issue the following command in the command prompt window and hit enter: 
    net start wuauser
  8. Restart your computer.

Try to update your PC again now. It should install the latest available KB4343909 update. If not, manually install the update.

Manually download/install the KB4343909 update

If clearing the Windows 10 update cache didn’t help, you can download and install the KB4343909 update manually on your PC. Below are download links for the update for x64, x86 and ARM64 hardware types.

Download Cumulative Update for Windows 10 Version 1803 (KB4343909):

To install the update manually, download the KB4343909 cumulative update file appropriate for your PCs hardware from the download links above.

Double-click/run the .msu update file. You’ll get a prompt from Windows Update Standalone Installer, click on the Yes button to install the update.

Once the installation completes, restart your PC for the update to take effect.

After restarting the PC, check your Windows 10 version to verify that the update has been installed on your computer.

Tip: If the standalone installer fails to install the update as well, run check disk on all your drives and fix any error that it finds. Try installing the update again via the standalone installer after fixing drive errors.