What's New in Windows 11 KB5054979 & How to Fix Update Issues

Windows 11 KB5054979 Update: Installation Guide and Troubleshooting

For Windows 11 24H2 version, Microsoft has released cumulative update KB5054979, which includes several improvements and bug fixes. This article will guide you on how to install this update and provide a solution to the installation failure.

About Windows 11 24H2 KB5054979

KB5054979 was released on March 27, 2025 and is a security update for Windows 11 24H2 versions.NET Framework 3.5 and 4.8.1. This update enhances the security and reliability of .NET Framework 3.5 and 4.8.1 and fixes bugs related to using the System.IO API for file and directory operations on UNC shares. Users are advised to install it as part of the standard maintenance process.

Windows 11 KB5054979 Download and Install

The following two methods can be used to install this security update:

Tip: Before installing any updates (including KB5054979), it is recommended to back up important files or create system images using reliable backup software such as MiniTool ShadowMaker to prevent accidental data loss or system failure.

Method 1: Update via Windows settings

1. Press Win I to open Windows settings.
2. Go to "Windows Update" and click "Check for updates". You will find an update named "2025-03. .NET Framework 3.5 and 4.8.1 Cumulative Update Preview (KB5054979) for Windows 11 Version 24H2 (x64)" and click "Download and Install".

Method 2: Update via the download link

1. Go to Microsoft Update Catalog and search for KB5054979 update.
2. Select the version that matches your computer and click "Download" to get the installation package.
3. In the prompt window, click the link to download the .msu file. After the download is complete, double-click the file to start the installation.

Solution to the installation failure of KB5054979

If you encounter the problem of failing installation of KB5054979, try the following solution:

Method 1: Use Windows Update Troubleshooter

Windows includes multiple troubleshooting programs that solve problems such as hardware, networking, and updates. First, run the Windows Update Troubleshooter:

1. Press Win I to open Windows settings.
2. Go to System > Troubleshooting > Other Troubleshooting Programs > Windows Update.
3. Click the "Run Troubleshooter" button. Allows the computer to automatically recognize and resolve any detected problems.

Method 2: Perform SFC and DISM scanning

Corrupted system files may interrupt the Windows update process and cause update failures. Execute SFC and DISM command lines to fix these error files:

1. Run command prompt as administrator.
2. Enter sfc /scannow and press Enter to run this command.
3. When finished, enter the following command line and press Enter after each command:

DISM /Online /Cleanup-Image /Checkhealth

DISM /Online /Cleanup-Image /Scanhealth

DISM /Online /Cleanup-Image /Restorehealth

Method 3: Reset Windows Update Components

Windows Update Components are essential for downloading and installing updates. If KB5054979 is still not installed, consider resetting Windows Update Components (see the relevant guide).

Problems that may be encountered after the update

After the update, you may encounter some new problems:

Problem 1: The drive pool disappears

After KB5054979 is installed, the drive pool may disappear. You can see a non-pooled drive, but you can't see the pool, and you can't create or do anything about it. Workaround: Assign a drive letter to each storage pool drive.

Problem 2: File Explorer does not work

File Explorer may not be opened after installing KB5054979. Workaround: First try uninstalling Windows updates. If it is invalid, please refer to the relevant guide to fix this issue.

Tip: Uninstalling Windows updates may cause PC data to be lost. In this case, it is recommended to use data recovery software such as MiniTool Power Data Recovery.

Summarize

This article introduces the content of the update of Windows 11 KB5054979 and the solution to the failure of installation of KB5054979. Hope this information is helpful to you.

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