KB5061258 Hotpatch (OS Build 26100.3983) Out-of-Band - May 16, 2025

Summary

This is an out-of-band hotpatch update for Windows 11 Enterprise LTSC 2024, released by Microsoft Support on May 16, 2025. It brings the OS to build 26100.3983 and delivers miscellaneous security improvements to internal OS functionality. No additional issues are documented in this release. Arm64 device support remains in public preview.

Improvements and fixes

• This update makes miscellaneous security improvements to internal OS functionality. Microsoft states that there are no additional issues documented in this release.
• If earlier updates were already installed, devices download and install only the new content contained in this package.

Known issues

Microsoft lists no known issues for this update at the time of writing.

How to get this update

Before installing, note that Microsoft combines the latest servicing stack update (SSU) for your operating system with the hotpatch update. If you are using Windows Update, the latest SSU installs automatically alongside this update. The associated SSU is KB5058523, version 26100.4060.

Install this update through one of the following channels:

• Windows Update / Microsoft Update - the update downloads and installs automatically.
• Microsoft Update Catalog - see the catalog for manual download options.
• Windows Server Update Services (WSUS) - see the catalog for additional options.

For a list of files included in the cumulative update, download the file information for KB5061258. For a list of files in the servicing stack update, download the file information for SSU KB5058523 (version 26100.4060).

Important: For Arm64 devices, hotpatch updates are still in public preview.

Frequently asked questions

What is a hotpatch update and how does it differ from a regular cumulative update?

A hotpatch update applies security fixes to running processes in memory without requiring an immediate restart. This reduces downtime compared with traditional cumulative updates. Microsoft publishes release notes for hotpatch on Windows 11 version 24H2 Enterprise clients, and general terminology is covered in the Windows update types documentation.

Does this update require a servicing stack update to be installed first?

Microsoft bundles the latest SSU with this hotpatch. If you deploy via Windows Update, the SSU (KB5058523, version 26100.4060) installs automatically. If you are using WSUS or the Update Catalog, review the additional options listed in those channels to ensure the SSU is present before applying the hotpatch.

Which devices and editions does KB5061258 apply to?

This update applies to Windows 11 Enterprise LTSC 2024 on x64 and Arm64 devices. Arm64 support for hotpatch updates is still in public preview, so administrators managing Arm64 fleets should account for that status when planning deployment.

How can I confirm the update installed successfully and track future releases?

After installation, verify the OS build reads 26100.3983 in Settings - System - About. For ongoing release tracking, Microsoft recommends following @WindowsUpdate and consulting the update history for Windows 11 version 24H2 and the Windows Release health dashboard.