Windows 11 KB5124010 update released with 46 changes and fixes

Recorded: Sept. 24, 2026, 1 p.m.

Original

News

Featured
Latest

ShinyHunters claims FBI hack, data theft in PeopleSoft zero-day breach

New Windows Defender zero-day blocks Microsoft antivirus updates

EvilTokens PhaaS disrupted after compromising 12,000 Microsoft accounts

Check Point warns of Management Server zero-day exploited in attacks

Windows 11 KB5124010 update released with 46 changes and fixes

Get AI-powered Autodesk AutoCAD for $399, save $1,696

CISA: Ransomware gangs now exploiting critical TeamCity flaw

OpenAI hacked Australian Medicare govt site, probed data providers

Tutorials

Latest
Popular

How to access the Dark Web using the Tor Browser

How to enable Kernel-mode Hardware-enforced Stack Protection in Windows 11

How to use the Windows Registry Editor

How to backup and restore the Windows Registry

How to start Windows in Safe Mode

How to remove a Trojan, Virus, Worm, or other Malware

How to show hidden files in Windows 7

How to see hidden files in Windows

Webinars
Downloads

Latest
Most Downloaded

Qualys BrowserCheck

STOPDecrypter

AuroraDecrypter

FilesLockerDecrypter

AdwCleaner

ComboFix

RKill

Junkware Removal Tool

Deals

Categories

eLearning

IT Certification Courses

Gear + Gadgets

Security

VPNs

Popular

Best VPNs

How to change IP address

Access the dark web safely

Best VPN for YouTube

Forums
More

Virus Removal Guides
Startup Database
Uninstall Database
Glossary
Send us a Tip!
Welcome Guide

HomeNewsMicrosoftWindows 11 KB5124010 update released with 46 changes and fixes

Windows 11 KB5124010 update released with 46 changes and fixes

By Sergiu Gatlan

September 24, 2026
08:16 AM
0

Microsoft released the KB5124010 September 2026 non-security preview update for Windows 11 24H2 and 25H2, with 46 changes including Bluetooth improvements and the ability to remap the Copilot key.
KB5124010 is a preview update that lets administrators and users test Windows improvements, bug fixes, and new features before they become generally available during next month's Patch Tuesday release.
However, unlike regular cumulative updates, monthly optional updates like KB5124010 provide only quality improvements and don't include security fixes.
The September 2026 preview update adds support for Emoji 17.0, a new "Open apps maximized" accessibility setting that automatically maximizes app windows as they open, and a recovery remote management plug-in for extending Windows Recovery (WinRE) management capabilities.
Microsoft also resolved an issue where the Bluetooth radio could be turned off while the Bluetooth radio control toggle in Settings still showed as on, and a bug that could cause crashes with error code 0x139 while streaming Bluetooth audio.
It also improved microphone compatibility with certain Bluetooth Classic audio accessories, as well as reliability and performance with LE Audio accessories.
After deploying this preview update, users can also remap the Copilot key on their Windows devices via a new Windows 11 setting to function as the Right Ctrl or Context Menu key.
You can install the KB5124010 update by opening Settings, clicking on Windows Update, and then "Check for Updates."

KB5124010 preview update (BleepingComputer)
Because this is an optional update, you will need to click the "Download and install" link unless you already have the "Get the latest updates as soon as they're available" option enabled, which will prompt the OS to install it automatically.
You can also manually download and install the KB5124010 preview update from the Microsoft Update Catalog.
Windows 11 KB5124010 highlights
Once installed, this optional non-security update will upgrade Windows 11 25H2 and 24H2 devices to builds 26200.9550 and 26100.9550, respectively.
The September 2026 preview update comes with many other changes, some of the more important ones highlighted below:
This update adds support for using slideshow wallpapers with multiple desktops, so that it won't automatically switch you back to Picture.
New! Additional gesture controls for precision touchpads are available in Settings > Bluetooth & devices > Touchpad.
New! This update introduces Camera roll backup in Settings, helping eligible users protect their photos with OneDrive. You can turn on the feature from the Settings Home or Accounts page and complete setup on a mobile phone using a QR code.
In this update, Microsoft also fixed a known issue that was causing the built-in File History backup feature on some Windows systems to fail after installing the September 2026 security updates.
KB5124010 also removes PC-to-PC Migration, a tool that helped users transfer their files, settings, and preferences to a new Windows device. Microsoft now recommends using Windows Backup to migrate to a new PC using OneDrive.
Microsoft also reminded users that KB5124010 is the final preview update for Windows 11 24H2, which reaches end of support in October 2026.

Build your security blueprint for AI-powered attacks

Join Mikko Hyppönen and security leaders from the NFL, CHANEL, and Atlassian for a two-hour digital summit on what AI-speed attacks change, what defenders should stop doing, and how to validate, decide, fix, and re-validate at machine speed.
Save your seat

Related Articles:
Microsoft fixes bug that wiped Windows desktop settingsMicrosoft says KB5120998 Windows update resets desktop settingsMicrosoft: KB5120998 mouse reset bug affects only non-English PCsMicrosoft says Windows 11 KB5120998 update resets mouse settingsWindows 11 KB5120998 update released with 35 changes and fixes

KB5124010
Microsoft
Optional Updates
Preview Update
Windows
Windows 11

Sergiu Gatlan
Sergiu is a news reporter who has covered the latest cybersecurity and technology developments for over a decade. Email or Twitter DMs for tips.

Popular Stories

ShinyHunters claims FBI hack, data theft in PeopleSoft zero-day breach

Microsoft reminds admins to migrate Entra ID users to passkeys

New Windows Defender zero-day blocks Microsoft antivirus updates

Sponsor Posts

Overdue a password health-check? Audit your Active Directory for free

Automate Onboarding and Access Reviews with No-Code IGA: See how it works

AI is a data-breach time bomb: Read the new report

Build cyber resilience with Wazuh: The open-source SIEM & XDR for proactive protection

Overdue a password health-check? Audit your Active Directory for free

Main Sections

News
Webinars
VPN Buyer Guides
SysAdmin Software Guides
Downloads
Virus Removal Guides
Tutorials
Startup Database
Uninstall Database
Glossary

Community

Forums
Forum Rules
Chat

Useful Resources

Welcome Guide
Sitemap

Company

About BleepingComputer
Contact Us
Send us a Tip!
Advertising
Write for BleepingComputer
Social & Feeds
Changelog

Username

Password

Remember Me

Not a member yet? Register Now

Reporter

Help us understand the problem. What is going on with this comment?

Spam

Abusive or Harmful

Inappropriate content

Strong language

Other

Read our posting guidelinese to learn what content is prohibited.

Submitting...
SUBMIT

Microsoft released the KB5124010 update in September 2026, which functions as a non-security preview update for Windows 11 versions 24H2 and 25H2, incorporating forty-six distinct changes and fixes. This preview update is designed to allow administrators and users an environment to test potential Windows improvements, bug resolutions, and new features prior to their general release during the subsequent Patch Tuesday. It is crucial to note that unlike standard cumulative updates, KB5124010 exclusively contains quality improvements and does not include security patches.

The update introduces several functional enhancements across the operating system. Specifically, it adds support for Emoji 17.0 and introduces a new accessibility feature named "Open apps maximized," which automatically maximizes application windows upon launch. Furthermore, this update extends management capabilities by adding a remote management plug-in that enhances Windows Recovery (WinRE) functionality.

In terms of hardware and connectivity, KB5124010 addresses several issues related to Bluetooth performance and compatibility. The update resolves an inconsistency where the Bluetooth radio control toggle in Settings displayed 'on' while the radio was actually disabled, and it fixes a bug that could induce crashes with error code 0x139 when streaming Bluetooth audio. Performance improvements were also realized through enhanced microphone compatibility with certain Bluetooth Classic audio accessories and better reliability and performance when using LE Audio accessories. Additionally, the update provides new gesture controls for precision touchpad interaction within the Settings menu under Bluetooth & devices > Touchpad.

The update also introduces novel features focused on personalization and data management. Users gain the ability to utilize slideshow wallpapers across multiple desktops without the automatic reversion to Picture mode. A new feature, Camera roll backup, is integrated into Settings, enabling eligible users to protect their photos via OneDrive, with setup facilitated through a mobile device using a QR code. A significant refinement in file management involves the removal of the PC-to-PC Migration tool; Microsoft now recommends utilizing Windows Backup, integrated with OneDrive, for migrating files, settings, and preferences to new devices. Furthermore, the update corrected a known issue that previously prevented the built-in File History backup feature from operating correctly on some Windows systems following the installation of prior security updates.

Finally, the release serves as a critical waypoint for Windows 11 24H2, as it is emphasized by Microsoft as the final preview update for this version, which is scheduled to reach its end of support in October 2026. Users can install this optional update by navigating to Settings, selecting Windows Update, and initiating a check for updates, or by downloading the preview directly from the Microsoft Update Catalog.