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-KB2572078-x86.exeRecommended
      Click here10.7 MB
      Click here10.7 MB
      NDP40-KB2572078-IA64.exeRecommended
      Click here28.9 MB
      Click here28.9 MB
      NDP40-KB2572078-x64.exeRecommended
      Click here22.7 MB
      Click here22.7 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 Visual Studio Community 2013 for free.
    Download Visual Studio Community 2013 for free
    Everything you need to create great apps.
    Download now