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    Windows XP Security Patch: Buffer Overrun in Windows Kernel Message Handling Could Lead to Elevated Privileges

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    This update addresses the vulnerability addressed in Knowledge Base Article 811493. To find out if more recent security updates are available for you, see the Overview section of this page.
    • Version:


      File Name:


      Date Published:


      File Size:

      3.2 MB

        A more recent critical security update is now available. To find the latest security releases for you visit Windows Update and click "Scan for updates." And visit the Protect your PC site to learn how to have the latest security updates delivered directly to your computer.

        About this download: A security issue has been identified that could allow an attacker to compromise a computer running Microsoft® Windows® XP and gain complete control over it. An attacker would need the ability to log onto the computer locally to carry out an attack. You can help protect your computer by installing this update from Microsoft.
    • Supported Operating System

      Windows XP

        • Windows XP Professional
        • Windows XP Home Edition
        1. Click the Download link to start the download, or choose a different language from the drop-down list and click Go.
        2. Do one of the following:
          • To start the installation immediately, click Open or Run this program from its current location.
          • To copy the download to your computer for installation at a later time, click Save or Save this program to disk.