The April 9, 2024 update for Windows 11, version 22H2 and Windows 11, version 23H2 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.

This article describes the security and cumulative update for 3.5, 4.8 and 4.8.1 for Windows 10 Version 22H2. Security Improvements. This security update addresses a remote code execution vulnerability detailed in CVE-2024-21409.

This update provides latest updates for Windows Security platform, which is comprised of the Windows Security app and its underlying service. To obtain the current version of Windows Security app, please run powershell command below: Get-AppPackage Microsoft.SecHealthUI. Manually download the update.

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.

The original version of the .NET Framework 3.5 together with the .NET Framework 2.0 SP1 and the .NET Framework 3.0 SP1 are no longer in support. Discusses support life cycle details for the .NET Framework 3.5, .NET Framework 3.0 and .NET Framework 2.0.

Resolves a vulnerability in the Microsoft .NET Framework that could allow remote code execution when the .NET Framework processes untrusted input.

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.

After installing this update, you might be unable to change your user account profile picture. When attempting to change a profile picture by selecting the button Start > Settings> Accounts > Your info, and then selecting Choose a file, you might receive an error message with error code 0x80070520.

Press and hold (or right-click) on the program you want to remove and select Uninstall or Uninstall / Change. Then follow the directions on the screen. Need more help? If you can't find an app or program, try the tips in See all your apps in Windows 10 and Program is not listed in add/remove programs after installation.

What does the troubleshooter do? This troubleshooter helps determine if your device might be impacted by known issues from the next Windows 10 Feature Update. When does the troubleshooter run? This troubleshooter runs automatically on devices that meet certain criteria. It cannot be run manually.