Sign in

    Windows 8.1 Update for x64-based Systems (KB2919355)

    Select Language:
    Windows 8.1 Update is a cumulative set of security updates, critical updates and updates.
    • Note:There are multiple files available for this download.Once you click on the "Download" button, you will be prompted to select the files you need.


      File Name:








      Date Published:


      File Size:

      38 KB

      690.8 MB

      48.0 MB

      126.4 MB

      303 KB

      19.6 MB

      2.8 MB

      KB Articles: KB2919355

      Security bulletins:MS14-018

        Windows 8.1 Update is a cumulative set of security updates, critical updates and updates. You must install Windows 8.1 Update to ensure that your computer can continue to receive future Windows Updates, including security updates. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    • Supported Operating System

      Windows 8.1

        1. To start the download, click the Download button and then do one of the following, or select another language from Change Language and then click Change.
          • Click Run to start the installation immediately.
          • Click Save to copy the download to your computer for installation at a later time.
        2. These KB's must be installed in the following order: clearcompressionflag.exe, KB2919355, KB2932046, KB2959977, KB2937592, KB2938439, and KB2934018.
        3. KB2919442 is a prerequisite for Windows 8.1 Update and should be installed before attempting to install KB2919355
      • Other critical security updates are available: To find the latest security updates for you, visit Windows Update and click Express Install. To have the latest security updates delivered directly to your computer, visit the Security At Home web site and follow the steps to ensure you're protected.