How to obtain and install the update. This update is available on Microsoft Update for Windows client operating systems and available on WSUS and MU Catalog for Windows Server operating systems.

October 8, 2024. Version: .NET Framework 3.5 and 4.8.1. The October 8, 2024 update for Windows 11, version 24H2 includes security and cumulative reliability improvements in .NET Framework 3.5 and 4.8.1. We recommend that you apply this update as part of your regular maintenance routines.

Microsoft .NET Framework 4.8.1 is a highly compatible and in-place update to .NET Framework 4.8. It includes native support for the Arm64 architecture (Windows 11+), accessibility improvements as well as other improvements. For a complete list of improvements see: .NET Framework 4.8.1 release notes.

IMPORTANT Home and Pro editions of Windows 11, version 22H2 are at end of service today, October 8, 2024. They will no longer receive any updates. To continue receiving security and non-security updates after October 8, 2024, we recommend that you update to the latest version of Windows.

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates.

The Microsoft .NET Framework 4.7.1 is a highly compatible in-place update to the Microsoft .NET Framework 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, and 4.7. The web installer is a small package that automatically determines and downloads only those components that apply to a particular platform.

The Microsoft .NET Framework 4.8 is a highly compatible, in-place update to the Microsoft .NET Framework 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1 and 4.7.2. The offline package can be used in situations in which the web installer cannot be used because of lack of Internet connectivity.

The .NET Framework servicing update released on July 2024 security and quality rollup - .NET Framework contains a security fix addressed an elevation of privilege vulnerability detailed in CVE 2024-38081. The fix changed System.IO.Path.GetTempPath method return value.

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) 。 它还支持命令行使用以及更高级的选项。

可以从 .NET 下载站点下载以下文件： 立即下载 Microsoft .NET Framework 4.8 脱机安装程序包。 对于 Windows RT 8.1： 立即下载 Microsoft .NET Framework 4.8 程序包。 有关如何下载 Microsoft 支持文件的详细信息，请参阅如何从联机服务中获取 Microsoft 支持文件。