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Update the Windows Update Agent to the latest version

  • 7 minutes to read

This article describes how to update Windows Update Agent to the latest version.

Applies to: Windows 7, Windows 8, Windows Server 2008 R2, Windows Server 2012
Original KB number:   949104


When automatic updating is enabled, the latest version of the Windows Update Agent will automatically be downloaded and installed on your computer. You can also manually download the update agent and install Windows.

Automatic download of Windows Update Agent

To automatically download the Windows Update Agent, do the following:

  1. Activate the automatic update. Follow the steps below to find the version of Windows that you are running.

    • Windows 8.1 or Windows 8

      1. Open Windows Update by expanding from the right edge of the screen (or, if you're using a mouse, pointing to the lower right corner of the screen and moving the mouse pointer up) Settings Tap or click, tap or click Control Panel, and then tap Windows Update or click.
      2. Tap or click to change settings.
      3. Choose See Important Updates the option Install updates automatically out.
      4. Activate You under Recommended Updates Select the Give me recommended updates the same way I do important ones check box Updates get, then choose OK off.
    • Windows 7, Windows Vista or Windows XP

      To activate the automatic update automatically, select the button or the link Remedy , then select in the Download dialog box Show select the Run option. Then follow the steps in the wizard to fix the problem out.

  2. Restart the Windows update service. To do this, proceed as follows:

    1. Press Windows Key + R to bring up the field Run to to open.
    2. Give You services.msc in the Run field , and then press ENTER.
    3. Click with the right Windows Update in the Service Management Console, and then select Exit out. If you are using xp windows, right click on it Automatic updates, and choose then exit.
    4. After Windows Update has finished, right click Mouse button on Windows Update, and choose then start off. If you are using xp windows, right click on it Automatic updates, and then select Start off.
  3. Wait for Windows Update to start, and then check to see if the Windows Update Agent has been updated.

Manually download the Windows Update Agent from the Microsoft Download Center

Click the download link for your version of Windows to get the latest version of Windows Update Agent.

Standalone packages for Windows 8 and Windows Server 2012

The following files are available for download from the Microsoft Download Center.

Stand-alone packages for Windows 7 SP1 and Windows Server 2008 R2 SP1

The following files are available for download from Update Windows.


Windows 8.1, Windows RT 8.1 and Windows Server 2012 R2 with update 2919355 already contain the latest version of the Windows Update Agent.

additional Information

If you get a Windows update error, try solutions to common Windows update errors.

For more information about how to check which version of Windows Update Agent is installed, see the following steps:

  1. Open the folder. is the folder where Windows is installed. The folder is e.g. B.
  2. Right click Wuaueng.dll, and then select Properties.
  3. Choose the Details tab , and then find the file version number.


The latest version of the Windows Update Agent for Windows 8.1 is 7.9.9600.16422. The latest version of the Windows Update Agent for Windows 8 is 7.8.9200.16693. The latest version of the Windows Update Agent for Windows 7, Windows Vista, and Windows XP is 7.6.7600.256.

Improvements in version 7.6.7600.256 of Windows Update Agent

  • A restoring infrastructure so that the Windows Update Client only trusts files that are signed by a new certificate. The certificate is only used to protect updates for Windows.

  • A more secure communication channel for the Windows update client

Improvements in version 7.4.7600.226 of Windows Update Agent

  • Improved scan times for Windows updates.
  • Improved Windows update ui for computers running Windows Vista or Windows Server 2008.
  • More visible and detailed descriptions of updates.
  • Improvements to notifying users of service packs.

Issues fixed in version 7.2.6001.788 of Windows Update Agent

Version 7.2.6001.788 of the Windows Update Agent resolves the following issue. This problem was not previously documented in a Microsoft Knowledge Base article:

  • If you try to install at least 80 updates from Windows Update or Microsoft Update at the same time, you will get a 0x80070057 error code.

Improvements in version 7.2.6001.784 of Windows Update Agent

  • Improved scan times for Windows Update
  • Improved the speed at which signature updates are delivered
  • Windows installer support
  • Improved error messages

Issues fixed in version 7.0.6000.381 of Windows Update Agent

Version 7.0.6000.381 of the Windows Update Agent resolves the following issues. These issues were not previously documented in a Microsoft Knowledge Base article:

  • The Background Intelligent Transfer Service (BITS) crashes on a Windows Vista-based computer. For more information, see An update is available to resolve a Background Intelligent Transfer Service (BITS) crash on a Windows Vista-based computer.
  • A fix is ​​included that reduces the number of reboots required for the stand-alone installer when using multilingual User Interface Pack (MUI) files.
  • Corrects user interface elements in Korean, Simplified Chinese, and Traditional Chinese.
  • The Windows vista installation experience has been improved.

Windows Update helps keep your computer up-to-date and secure by downloading and installing the latest security and other updates from Microsoft. Windows Update determines which updates are applied to your computer.

Microsoft periodically makes software updates available to users of Windows and other Microsoft software. These include updates to improve reliability and performance, updates that offer new protection against malware and other potentially unwanted software, and upgrades to Windows features. To improve the performance or reliability of hardware components on your computer, Microsoft may also provide device driver updates that are provided by the computer manufacturer.

When you activate Windows Update, software components directly related to Windows Update occasionally need to be updated on your computer. These updates need to be run so that Windows Update can check for necessary updates or install other updates. These required updates fix bugs, provide continuous improvement, and maintain compatibility with the Microsoft servers that support Windows. If you turn off Windows Update, you will not receive these updates.

Windows Update is configured to automatically install updates if you select the recommended option during Windows Out Of Box Experience (OOBE) setup. You can also activate the update for Windows by selecting one of the following settings in the Automatic Updates item in Control Panel:

  • Automatic (recommended).
  • Download updates for me, but let me choose when to install them.
  • Notify me, but don't download or install them automatically.

After you enable Windows Update, Windows Update will automatically download and install the required updates for components without notifying you. This behavior occurs regardless of which setting you use to activate Windows. If you don't want to receive required updates, you can turn off automatic updates in the Control Panel.

The updates for Windows Update themselves typically perform the following steps: addressing customer feedback, improving compatibility, service and reliability, and enabling new service features. When the Windows update server is updated, a corresponding client update is usually required. Windows Update Agent files can be added, changed, or replaced during an agent self-update process. For example, Windows Update Agent files can be added that display the user interface or determine whether updates apply to a particular system. This behavior occurs when a system is set to automatically check for available updates. This does not occur if automatic updates are disabled. For example, this behavior does not occur if you select Never check for updates or Automatic updates in Windows Vista and Windows 7 in Select Deactivate Windows XP.

Administrators can get the latest version of the Windows Update Agent for deployment through Windows Server Update Services (WSUS).