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    Microsoft .NET Framework 4 Reliability Update 1 (KB2533523)

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    Install this reliability update to resolve issues in Microsoft .NET Framework 4.
    • Note:There are multiple files available for this download.Once you click on the "Download" button, you will be prompted to select the files you need.


      File Name:




      Date Published:


      File Size:

      19.2 MB

      45.2 MB

      37.3 MB

      KB Articles: KB2533523

        Install this reliability update to address stability, reliability, and performance issues in Microsoft .NET Framework 4. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article KB2533523 for more information.

        After you install this item, you may have to restart your computer.
    • Supported Operating System

      Windows 7, Windows Server 2003, Windows Server 2008, Windows Server 2008 R2, Windows Vista, Windows XP

        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.
      • Please see the Knowledge Base Article KB2533523 for more information.