Developer Tools

    Thank you for downloading

    • Security Update for Microsoft .NET Framework 4

      If your download does not start after 30 seconds,
      Click here

      Choose the files that didn't download.

      File NameDownload LinkSize
      NDP40-KB2487367-x86.exeRecommendedClick here2.0 MB
      NDP40-KB2487367-IA64.exeRecommendedClick here2.0 MB
      NDP40-KB2487367-x64.exeRecommendedClick here2.0 MB
      Download Summary:
      KBMBGB

      You have not selected any file(s) to download.

          1. Click the Download button on this page to start the download, or select a different language from the Change language drop-down list and click Change.
          2. Do one of the following:
            • To start the installation immediately, click Run.
            • To save the download to your computer for installation at a later time, click Save.
            • To cancel the installation, click Cancel.

    Popular downloads

    Loading your results, please wait...

    Free PC updates

    • Security patches
    • Software updates
    • Service packs
    • Hardware drivers

    Microsoft suggests

    Download free tools to build apps for Windows.
    Download free tools to build apps for Windows
    Develop apps that reach the entire family of Windows devices.
    Get started