Developer Tools

Thank you for downloading

  • Security Update for Microsoft .NET Framework 4 on Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008

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

    Choose the files that didn't download.

    File NameDownload LinkSize
    NDP40-KB2604121-x86.exeRecommended
    Click here22.8 MB
    Click here22.8 MB
    NDP40-KB2604121-IA64.exeRecommended
    Click here43.4 MB
    Click here43.4 MB
    NDP40-KB2604121-x64.exeRecommended
    Click here38.3 MB
    Click here38.3 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...

Site feedback
Microsoft

What category would you like to give web site feedback on?



Rate your level of satisfaction with this web page today:

Comments:

Submit