File information. For a list of the files that are provided in this update, download the file information for cumulative update.. Prerequisites. To apply this update, you must have .NET Framework 3.5 or 4.8.1 installed.

Release Channel. Available. Next Step. Windows Update and Microsoft Update. Yes. None. This update will be downloaded and installed automatically from Windows Update.

Windows 11, version 21H2; October 8, 2024—KB5044280 (OS Build 22000.3260) September 10, 2024—KB5043067 (OS Build 22000.3197) August 13, 2024—KB5041592 (OS Build 22000.3147)

NET 8.0 has been refreshed with the latest update as of August 13, 2024. This update contains both security and non-security fixes. See the release notes for details on updated packages.

In Windows 7 SP1 and Windows Server 2008 R2 SP1, Update for Microsoft.NET Framework 4.8 (KB4503548) is displayed as an installed product under Programs and Features in Control Panel.

Note: NET Framework 4.8.1 installers have been refreshed to include the latest servicing updates as of June 13th, 2023. Apart from the servicing fixes, there is no change in the .NET Framework 4.8.1 product that was released originally on August 9th, 2022.

适用于 Windows 11 版本 24H2 的 2024 年 10 月 8 日更新包含 .NET Framework 3.5 和 4.8.1 的安全性和累积可靠性改进。 我们建议你将此更新作为定期维护工作的一部分进行应用。

Microsoft .NET Framework 修复工具可检测影响Microsoft .NET Framework 设置或更新的常见问题。 该工具尝试通过应用已知修补程序或通过修复受支持 .NET Framework 版本的损坏安装来解决这些问题。 该工具具有易于使用的基于向导的用户界面 (UI) 。

Microsoft .NET Framework 4.8.1 是.NET Framework 4.8 的高度兼容和就地更新。 它包括对 Arm64 体系结构的本机支持 (Windows 11+) 、辅助功能改进以及其他改进。 有关改进的完整列表，请参阅：.NET Framework 4.8.1 发行说明。

Microsoft .NET Framework 4.6 是 Microsoft .NET Framework 4、.NET Framework 4.5、.NET Framework 4.5.1 和 .NET Framework 4.5.2 的高度兼容的就地更新。 为了获得最佳效率和带宽要求，Microsoft 建议尽可能使用 Web 安装程序而不是脱机包。