Description of Software Update Services and Windows Server Update Services changes in content for 2021

Applies to: WindowsInternet Explorer.NET Framework

This article applies only to releases on the Windows Update website. This article does not apply to security releases for products that are not supported by Windows Update.

This article is intended for use by administrators of Windows Server Update Services (WSUS), Windows Update, and Microsoft Update services. This article contains a list of content changes that have been made available on the second Tuesday of every month for WSUS, Windows Update, and Microsoft Update. Administrators can use this list both as a quick reference to content changes that have been made during routine synchronizations and as an explanation of these changes.

This information will be updated during our regular update release on the second Tuesday of every month. This article lists changes that were made on or after January 12, 2021. It does not list changes that were made before that date. For more information about changes that occurred before January 12, 2021, see the "References" section.

Introduction


This article contains a cumulative list of Windows Update content changes that have been made available to Windows Update, Microsoft Update, and WSUS on or after January 12, 2021.

More Information


Tuesday, January 12, 2021

This is a summary of the new and changed content to be released on Tuesday, January 12, 2021.

New security content:

  • 2021-01 Security Only Quality Update for Windows 8.1 and Windows Server 2012 R2 (KB4598275)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4055038 on Windows 8.1 and Windows Server 2012 R2
    Target platforms: Windows 8.1 and Windows Server 2012 R2
    Approximate file sizes:
    • 2021-01 Security Only Quality Update for Windows 8.1 for x86-based Systems update: ~ 32138KB
    • 2021-01 Security Only Quality Update for Windows 8.1/Windows Server 2012 R2 for x64-based Systems update: ~ 55795KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598275

  • 2021-01 Security Monthly Quality Rollup for Windows Embedded 8 Standard and Windows Server 2012 (KB4598278)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592468 on Windows Embedded 8 Standard and Windows Server 2012
    Target platforms: Windows Embedded 8 Standard and Windows Server 2012
    Approximate file sizes:
    • 2021-01 Security Monthly Quality Rollup for Windows Embedded 8 Standard/Windows Server 2012 for x64-based Systems update: ~ 397607KB
    • 2021-01 Security Monthly Quality Rollup for Windows Embedded 8 Standard for x86-based Systems update: ~ 255101KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598278

  • 2021-01 Security Monthly Quality Rollup for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2 (KB4598279)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592471 on Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
    Target platforms: Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
    Approximate file sizes:
    • 2021-01 Security Monthly Quality Rollup for Windows Embedded Standard 7/Windows 7 for x86-based Systems update: ~ 241331KB
    • 2021-01 Security Monthly Quality Rollup for Windows Embedded Standard 7/Windows 7/Windows Server 2008 R2 x64 update: ~ 364008KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598279

  • 2021-01 Security Monthly Quality Rollup for Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2 (KB4598285)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592484 on Windows 8.1, Windows RT 8.1, and Windows Server 2012 R2
    Target platforms: Windows 8.1, Windows RT* 8.1, and Windows Server 2012 R2
    Approximate file sizes:
    • 2021-01 Security Monthly Quality Rollup for Windows 8.1/Windows Server 2012 R2 x64 update: ~ 550902KB
    • 2021-01 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems update: ~ 356330KB
    • 2021-01 Security Monthly Quality Rollup for Windows RT 8.1 for ARM-based Systems update: ~ 285521KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598285

  • 2021-01 Security Only Quality Update for Windows Server 2008 (KB4598287)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Target platforms: Windows Server 2008
    Approximate file sizes:
    • 2021-01 Security Only Quality Update for Windows Server 2008 for x64-based Systems update: ~ 34358KB
    • 2021-01 Security Only Quality Update for Windows Server 2008 for x86-based Systems update: ~ 23155KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598287

  • 2021-01 Security Monthly Quality Rollup for Windows Server 2008 (KB4598288)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592498 on Windows Server 2008
    Target platforms: Windows Server 2008
    Approximate file sizes:
    • 2021-01 Security Monthly Quality Rollup for Windows Server 2008 for x64-based Systems update: ~ 188483KB
    • 2021-01 Security Monthly Quality Rollup for Windows Server 2008 for x86-based Systems update: ~ 126570KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598288

  • 2021-01 Security Only Quality Update for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2 (KB4598289)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4055038 on Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
    Target platforms: Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
    Approximate file sizes:
    • 2021-01 Security Only Quality Update for Windows Embedded Standard 7/Windows 7/Windows Server 2008 R2 x64 update: ~ 46939KB
    • 2021-01 Security Only Quality Update for Windows Embedded Standard 7/Windows 7 for x86-based Systems update: ~ 28476KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598289

  • 2021-01 Security Only Quality Update for Windows Embedded 8 Standard and Windows Server 2012 (KB4598297)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes:
    • KB4055038 on Windows Server 2012
    • MS17-010 (KB4012598) on Windows Embedded 8 Standard

    Target platforms: Windows Embedded 8 Standard and Windows Server 2012
    Approximate file sizes:

    • 2021-01 Security Only Quality Update for Windows Embedded 8 Standard for x86-based Systems update: ~ 29459KB
    • 2021-01 Security Only Quality Update for Windows Embedded 8 Standard/Windows Server 2012 x64 update: ~ 50393KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598297

  • 2021-01 Cumulative Update for Windows Server, version 1909 and Windows 10 Version 1909 (KB4598229)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592449 on Windows Server, version 1909 and Windows 10 Version 1909
    Target platforms: Windows Server, version 1909 and Windows 10 Version 1909
    Approximate file sizes:
    • 2021-01 Cumulative Update for Windows Server, version 1909/Windows 10 Version 1909 x64 for ARM64-based Systems update: ~ 545396KB
    • 2021-01 Cumulative Update for Windows 10 Version 1909 for x64-based Systems update: ~ 446957KB
    • 2021-01 Cumulative Update for Windows 10 Version 1909 for x86-based Systems update: ~ 223348KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598229

  • 2021-01 Cumulative Update for Windows Server 2019 and Windows 10 Version 1809 (KB4598230)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592440 on Windows Server 2019 and Windows 10 Version 1809
    Target platforms: Windows Server 2019 and Windows 10 Version 1809
    Approximate file sizes:
    • 2021-01 Cumulative Update for Windows 10 Version 1809 for x64-based Systems update: ~ 386224KB
    • 2021-01 Cumulative Update for Windows 10 Version 1809 for x86-based Systems update: ~ 174274KB
    • 2021-01 Cumulative Update for Windows 10 Version 1809 for ARM64-based Systems update: ~ 452532KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598230

  • 2021-01 Cumulative Update for Windows 10 Version 1507 (KB4598231)

    Locale: All
    Deployment: Automatic Updates, WSUS, and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592464 on Windows 10 Version 1507
    Target platforms:
    Approximate file sizes:
    • 2021-01 Cumulative Update for Windows 10 Version 1507 for x64-based Systems update: ~ 1243681KB
    • 2021-01 Cumulative Update for Windows 10 Version 1507 for x86-based Systems update: ~ 738494KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598231

  • 2021-01 Cumulative Update for Windows 10 Version 20H2, Windows Server, version 20H2, Windows Server, version 2004, and Windows 10 Version 2004 (KB4598242)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592438 on Windows 10 Version 20H2, Windows Server, version 20H2, Windows Server, version 2004, and Windows 10 Version 2004
    Target platforms: Windows 10 Version 20H2, Windows Server, version 20H2, Windows Server, version 2004, and Windows 10 Version 2004
    Approximate file sizes:
    • 2021-01 Cumulative Update for Windows 10 Version 20H2, and Windows 10 Version 2004 for x86-based Systems update: ~ 140809KB
    • 2021-01 Cumulative Update for Windows 10 Version 20H2, Windows Server, version 20H2, Windows Server, version 2004, and Windows 10 Version 2004 for ARM64-based Systems update: ~ 476138KB
    • 2021-01 Cumulative Update for Windows 10 Version 20H2, Windows Server, version 20H2, Windows Server, version 2004, and Windows 10 Version 2004 for x64-based Systems update: ~ 424616KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    https://support.microsoft.com/help/4598242

  • 2021-01 Cumulative Update for Windows Server 2016 and Windows 10 Version 1607 (KB4598243)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4593226 on Windows Server 2016 and Windows 10 Version 1607
    Target platforms: Windows Server 2016 and Windows 10 Version 1607
    Approximate file sizes:
    • 2021-01 Cumulative Update for Windows Server 2016 for x64-based Systems update: ~ 1721957KB
    • 2021-01 Cumulative Update for Windows 10 Version 1607 for x86-based Systems update: ~ 909925KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598243

  • 2021-01 Cumulative Update for Windows 10 Version 1803 (KB4598245)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592446 on Windows 10 Version 1803
    Target platforms: Windows 10 Version 1803
    Approximate file sizes:
    • 2021-01 Cumulative Update for Windows 10 Version 1803 for x64-based Systems update: ~ 1336296KB
    • 2021-01 Cumulative Update for Windows 10 Version 1803 for x86-based Systems update: ~ 818117KB
    • 2021-01 Cumulative Update for Windows 10 Version 1803 for ARM64-based Systems update: ~ 1475326KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4598245

  • 2021-01 Servicing Stack Update for Windows Server, version 1909 and Windows 10 Version 1909 (KB4598479)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4586863 on Windows Server, version 1909 and Windows 10 Version 1909
    Target platforms: Windows Server, version 1909 and Windows 10 Version 1909
    Approximate file sizes:
    • 2021-01 Servicing Stack Update for Windows Server, version 1909/Windows 10 Version 1909 for x64-based Systems update: ~ 14621KB
    • 2021-01 Servicing Stack Update for Windows Server, version 1909/Windows 10 Version 1909 x64 for ARM64-based Systems update: ~ 17836KB
    • 2021-01 Servicing Stack Update for Windows 10 Version 1909 for x86-based Systems update: ~ 6482KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    https://support.microsoft.com/help/4598479

  • 2021-01 Servicing Stack Update for Windows Server 2019 and Windows 10 Version 1809 (KB4598480)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4587735 on Windows Server 2019 and Windows 10 Version 1809
    Target platforms: Windows Server 2019 and Windows 10 Version 1809
    Approximate file sizes:
    • 2021-01 Servicing Stack Update for Windows Server 2019/Windows 10 Version 1809 for x64-based Systems update: ~ 13812KB
    • 2021-01 Servicing Stack Update for Windows 10 Version 1809 for ARM64-based Systems update: ~ 17112KB
    • 2021-01 Servicing Stack Update for Windows 10 Version 1809 for x86-based Systems update: ~ 6148KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    https://support.microsoft.com/help/4598480

  • 2021-01 Servicing Stack Update for Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, and Windows 10 Version 2004 (KB4598481)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4593175 on Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, and Windows 10 Version 2004
    Target platforms: Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, and Windows 10 Version 2004
    Approximate file sizes:
    • 2021-01 Servicing Stack Update for Windows Server, version 20H2/Windows 10 Version 20H2/Windows Server, version 2004/Windows 10 Version 2004 for x64-based Systems update: ~ 14742KB
    • 2021-01 Servicing Stack Update for Windows Server, version 20H2/Windows 10 Version 20H2/Windows Server, version 2004/Windows 10 Version 2004 for ARM64-based Systems update: ~ 13627KB
    • 2021-01 Servicing Stack Update for Windows 10 Version 20H2/Windows 10 Version 2004 for x86-based Systems update: ~ 6657KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    https://support.microsoft.com/help/4598481

  • 2021-01 Cumulative Update for Windows 10 Version 1703 (KB4599208)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Security Updates
    Security severity rating: Critical
    Supersedes: KB4592473 on Windows 10 Version 1703
    Target platforms: Windows 10 Version 1703
    Approximate file sizes:
    • 2021-01 Cumulative Update for Windows 10 Version 1703 for x64-based Systems update: ~ 1593252KB
    • 2021-01 Cumulative Update for Windows 10 Version 1703 for x86-based Systems update: ~ 954632KB

    Description:
    A security issue has been identified in a Microsoft software product that could affect your system. You can help protect your system by installing this update from Microsoft. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article. After you install this update, you may have to restart your system.
    https://support.microsoft.com/help/4599208

New nonsecurity content:

  • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019 and Windows 10 Version 1809 (KB4586875)

    Locale: All
    Deployment: Catalog
    Classification: Updates, Non-Security
    Target platforms: Windows Server 2019 and Windows 10 Version 1809
    Approximate file sizes:
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019/Windows 10 Version 1809 x64 for ARM64 update: ~ 43206KB
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019/Windows 10 Version 1809 for x64 update: ~ 75970KB
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows 10 Version 1809 update: ~ 43212KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4586875

  • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, and Windows 10 Version 2004 (KB4586876)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4580419 on Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, and Windows 10 Version 2004
    Target platforms: Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, and Windows 10 Version 2004
    Approximate file sizes:
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 20H2/Windows 10 Version 20H2/Windows Server, version 2004/Windows 10 Version 2004 for ARM64 update: ~ 42188KB
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 20H2/Windows 10 Version 20H2/Windows Server, version 2004/Windows 10 Version 2004 for x64 update: ~ 65935KB
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 20H2, and Windows 10 Version 2004 update: ~ 42181KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4586876

  • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2019 and Windows 10 Version 1809 (KB4586877)

    Locale: All
    Deployment: Catalog
    Classification: Updates, Non-Security
    Target platforms: Windows Server 2019 and Windows 10 Version 1809
    Approximate file sizes:
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server 2019/Windows 10 Version 1809 for x64 update: ~ 79842KB
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1809 update: ~ 46458KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4586877

  • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 1909 and Windows 10 Version 1909 (KB4586878)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4580980 on Windows Server, version 1909 and Windows 10 Version 1909
    Target platforms: Windows Server, version 1909 and Windows 10 Version 1909
    Approximate file sizes:
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 1909/Windows 10 Version 1909 x64 for ARM64 update: ~ 44475KB
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 1909/Windows 10 Version 1909 for x64 update: ~ 77770KB
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1909 update: ~ 44464KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4586878

  • 2021-01 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 and Windows 10 Version 1607 (KB4597247)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4585207 on Windows Server 2016 and Windows 10 Version 1607
    Target platforms: Windows Server 2016 and Windows 10 Version 1607
    Approximate file sizes:
    • 2021-01 Cumulative Update for .NET Framework 4.8 for Windows Server 2016/Windows 10 Version 1607 for x64 update: ~ 54004KB
    • 2021-01 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1607 update: ~ 31085KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4597247

  • 2021-01 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1803 and Windows Server 2016 (KB4597249)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4585210 on Windows 10 Version 1803 and Windows Server 2016
    Target platforms: Windows 10 Version 1803 and Windows Server 2016
    Approximate file sizes:
    • 2021-01 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1803 update: ~ 31082KB
    • 2021-01 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1803/Windows Server 2016 for x64 update: ~ 54003KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4597249

  • 2021-01 Dynamic Update for Windows 10 Version 2004, and Windows 10 Version 20H2 (KB4598478)

    Locale: All
    Deployment: WSUS and Catalog
    Classification: High Priority, Non-Security
    Supersedes: KB4592920 on Windows 10 Version 2004, and Windows 10 Version 20H2
    Target platforms: Windows 10 Version 2004, and Windows 10 Version 20H2
    Approximate file sizes:
    • 2021-01 Dynamic Update for Windows 10 Version 2004, and Windows 10 Version 20H2 for x86-based Systems update: ~ 11207KB
    • 2021-01 Dynamic Update for Windows 10 Version 2004, and Windows 10 Version 20H2 for ARM64-based Systems update: ~ 11341KB
    • 2021-01 Dynamic Update for Windows 10 Version 2004, and Windows 10 Version 20H2 for x64-based Systems update: ~ 13062KB

    Description:
    Updates in the Windows 10 Dynamic Update category are used by Windows 10 to obtain critical driver, component, and setup improvements during the initial setup.
    http://support.microsoft.com/help/4598478

  • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019 and Windows 10 Version 1809 (KB4598499)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4586082 on Windows Server 2019 and Windows 10 Version 1809
    Target platforms: Windows Server 2019 and Windows 10 Version 1809
    Approximate file sizes:
    • 2021-01 Cumulative Update for .NET Framework 3.5 and 4.7.2 for Windows Server 2019/Windows 10 Version 1809 x64 for ARM64 update: ~ 43206KB
    • 2021-01 Cumulative Update for .NET Framework 3.5, 4.7.2 and 4.8 for Windows Server 2019/Windows 10 Version 1809 for x64 update: ~ 155812KB
    • 2021-01 Cumulative Update for .NET Framework 3.5, 4.7.2 and 4.8 for Windows 10 Version 1809 update: ~ 89670KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4598499

  • Windows Malicious Software Removal Tool (KB890830)

    Locale: All
    Deployment: Important/Automatic Updates, WSUS, and Catalog
    Classification: High Priority, Non-Security, Update Rollups
    Supersedes: KB890830 on Windows Server, version 20H2, Windows Server, version 2004, Windows Server, version 1909, Windows Server 2019, Windows Server 2016, Windows 10, Windows 8.1, Windows Server 2012 R2, Windows Server 2012, Windows 7, Windows Server 2008 R2, and Windows Server 2008
    Target platforms: Windows Server, version 20H2, Windows Server, version 2004, Windows Server, version 1909, Windows Server 2019, Windows Server 2016, Windows 10, Windows 8.1, Windows Server 2012 R2, Windows Server 2012, Windows 7, Windows Server 2008 R2, and Windows Server 2008
    Approximate file sizes:
    • Windows Malicious Software Removal Tool x64 update: ~ 77971KB
    • Windows Malicious Software Removal Tool update: ~ 69798KB

    Description:
    After the download, this tool runs one time to check your computer for infection by specific, prevalent malicious software (including Blaster, Sasser, and Mydoom) and helps remove any infection that is found. If an infection is found, the tool will display a status report the next time that you start your computer. A new version of the tool will be offered every month. If you want to manually run the tool on your computer, you can download a copy from the Microsoft Download Center, or you can run an online version from microsoft.com. This tool is not a replacement for an antivirus product. To help protect your computer, you should use an antivirus product.
    http://support.microsoft.com/kb/890830

  • 2021-01 Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 8.1 and Windows Server 2012 R2 (KB4597238)

    Locale: All
    Deployment: Catalog
    Classification: Updates, Non-Security
    Target platforms: Windows 8.1 and Windows Server 2012 R2
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 8.1 update: ~ 30240KB
    • 2021-01 Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 8.1/Windows Server 2012 R2 and Server 2012 R2 for x64 update: ~ 53678KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4597238

  • 2021-01 Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Embedded Standard 7, Windows 7, Windows Server 2008 R2, and Windows Server 2008 (KB4597239)

    Locale: All
    Deployment: Catalog
    Classification: Updates, Non-Security
    Target platforms: Windows Embedded Standard 7, Windows 7, Windows Server 2008 R2, and Windows Server 2008
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 4.6 for Windows Embedded Standard 7/Windows 7/Windows Server 2008 SP2 update: ~ 28436KB
    • 2021-01 Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows Embedded Standard 7/Windows 7/Windows Server 2008 R2/Windows Server 2008 for x64 update: ~ 42783KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4597239

  • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows Embedded 8 Standard and Windows Server 2012 (KB4597252)

    Locale: All
    Deployment: Catalog
    Classification: Updates, Non-Security
    Target platforms: Windows Embedded 8 Standard and Windows Server 2012
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows Embedded 8 Standard update: ~ 24568KB
    • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows Embedded 8 Standard/Windows Server 2012 for x64 update: ~ 40848KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4597252

  • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows 8.1 and Windows Server 2012 R2 (KB4597253)

    Locale: All
    Deployment: Catalog
    Classification: Updates, Non-Security
    Target platforms: Windows 8.1 and Windows Server 2012 R2
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows 8.1 update: ~ 31039KB
    • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows 8.1/Windows Server 2012 R2 and Server 2012 R2 for x64 update: ~ 53244KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4597253

  • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2 (KB4597254)

    Locale: All
    Deployment: Catalog
    Classification: Updates, Non-Security
    Target platforms: Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows Embedded Standard 7/Windows 7 update: ~ 26531KB
    • 2021-01 Security and Quality Rollup for .NET Framework 4.8 for Windows Embedded Standard 7/Windows 7/Windows Server 2008 R2 for x64 update: ~ 40961KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4597254

  • 2021-01 Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2 (KB4598500)

    Locale: All
    Deployment: Recommended/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4586083 on Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
    Target platforms: Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded Standard 7/Windows 7 update: ~ 117349KB
    • 2021-01 Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded Standard 7/Windows 7/Windows Server 2008 R2 for x64 update: ~ 173896KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4598500

  • 2021-01 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded 8 Standard and Windows Server 2012 (KB4598501)

    Locale: All
    Deployment: Recommended/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4586084 on Windows Embedded 8 Standard and Windows Server 2012
    Target platforms: Windows Embedded 8 Standard and Windows Server 2012
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded 8 Standard update: ~ 104154KB
    • 2021-01 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded 8 Standard/Windows Server 2012 for x64 update: ~ 167671KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4598501

  • 2021-01 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1 and Windows Server 2012 R2 (KB4598502)

    Locale: All
    Deployment: Recommended/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4586085 on Windows 8.1 and Windows Server 2012 R2
    Target platforms: Windows 8.1 and Windows Server 2012 R2
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1 update: ~ 120715KB
    • 2021-01 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1/Windows Server 2012 R2 and Server 2012 R2 for x64 update: ~ 206059KB
    • 2021-01 Security and Quality Rollup for .NET Framework 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1 RT for ARM-based Systems update: ~ 77068KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4598502

  • 2021-01 Security and Quality Rollup for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008 (KB4598503)

    Locale: All
    Deployment: Recommended/Automatic Updates, WSUS, and Catalog
    Classification: Updates, Non-Security
    Supersedes: KB4586086 on Windows Server 2008
    Target platforms: Windows Server 2008
    Approximate file sizes:
    • 2021-01 Security and Quality Rollup for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008 SP2 update: ~ 95740KB
    • 2021-01 Security and Quality Rollup for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008 SP2 for x64 update: ~ 141698KB

    Description:
    Install this update to resolve issues in Windows. For a complete listing of the issues that are included in this update, see the associated Microsoft Knowledge Base article for more information. After you install this item, you may have to restart your computer.
    http://support.microsoft.com/help/4598503

Changes to existing nonsecurity content:

  • 2020-11 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 20H2, Windows 10 Version 20H2, Windows Server, version 2004, Windows 10 Version 2004 (KB4580419)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4580419

  • 2020-11 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows Server, version 1909, Windows 10 Version 1909, Windows Server 2019 (1903), and Windows 10 Version 1903 (KB4580980)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4580980

  • 2020-11 Cumulative Update for .NET Framework 4.8 for Windows Server 2016 and Windows 10 Version 1607 (KB4585207)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4585207

  • 2020-11 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1703 (KB4585208)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4585208

  • 2020-11 Cumulative Update for .NET Framework 4.8 for Windows 10 Version 1803 and Windows Server 2016 (1803) for x64 (KB4585210)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4585210

  • 2020-11 Cumulative Update for .NET Framework 3.5, 4.7.2 and 4.8 for Windows Server 2019 and Windows 10 Version 1809 (KB4586082)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4586082

  • 2020-11 Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded Standard 7, Windows 7, and Windows Server 2008 R2 (KB4586083)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4586083

  • 2020-11 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows Embedded 8 Standard and Windows Server 2012 (KB4586084)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4586084

  • 2020-11 Security and Quality Rollup for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 8.1 and Windows Server 2012 R2 (KB4586085)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4586085

  • 2020-11 Security and Quality Rollup for .NET Framework 2.0, 3.0, 4.5.2, 4.6 for Windows Server 2008 (KB4586086)
    • Metadata has changed.
    • Binaries have not changed.
    • This update does not have to be reinstalled.

    http://support.microsoft.com/help/4586086

References


For more information about the Software Update Services and Windows Server Update Services changes that occurred before January 12, 2021, go to the following Microsoft websites to check the content for each year: