Trace Id is missing

Unlock your potential with Microsoft Copilot

Get things done faster and unleash your creativity with the power of AI anywhere you go.
Microsoft Copilot app being utilized to generate pictures of a singing dog, assisting to identify a flower, and helping to generate an email to congratulate a coworker on a promotion.

Security Update for Microsoft .NET Framework 4.5.1 and .NET Framework 4.5.2 on Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2

A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain access to information.

Important! Selecting a language below will dynamically change the complete page content to that language.

  • Version:

    4.5.1,4.5.2

    Date Published:

    4/13/2015

    File Name:

    Windows8.1-KB3037579-arm.msu

    Windows8.1-KB3037579-x64.msu

    Windows8.1-KB3037579-x86.msu

    File Size:

    4.4 MB

    6.9 MB

    6.0 MB

    KB Articles:

    KB3037579

    Security bulletins:

    MS15-041

    A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain access to information. You can help protect your system by installing this update from Microsoft. After you install this update, you may have to restart your system.
  • Supported Operating Systems

    Windows 8.1, Windows Server 2012 R2


    Note: More information about Service Pack levels currently supported for the platforms listed above can be found in the following page: Microsoft Product Support Lifecycle.
    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 KB3037579 for more information.
Follow Microsoft