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.

You can start a scan for malware any time you like.

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.

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)

Microsoft Edge offers two optional browsing modes—Balanced and Strict—for enhanced security to provide you with an extra layer of protection when browsing the web and unfamiliar sites.

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.

.NET Core 3.1 has been refreshed with the latest update as of July 13, 2021. This update contains reliability and other non-security fixes. See the release notes for details on updated packages..NET Core 3.1 servicing updates are upgrades, that is, the latest servicing update for 3.1 will remove the previous 3.1 update upon successful installation.

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。