Windows 11 KB5124010 update released with 46 changes and fixes
Microsoft shipped optional Windows 11 preview KB5124010, a non-security update with 46 quality fixes and feature changes.
Microsoft released KB5124010, the September 2026 optional non-security preview for Windows 11 24H2 and 25H2, with 46 quality changes and no security fixes. It moves those releases to builds 26100.9550 and 26200.9550 and includes Bluetooth reliability fixes, Emoji 17.0, an option to open apps maximized, and Copilot-key remapping. The update also repairs File History failures that followed the September 2026 security updates, removes PC-to-PC Migration in favor of Windows Backup, and is the last preview for 24H2 before end of support in October 2026.
- Optional non-security preview KB5124010 targets Windows 11 versions 24H2 and 25H2.
- Install raises builds to 26100.9550 (24H2) and 26200.9550 (25H2).
- Changes cover Bluetooth audio, Emoji 17.0, Copilot-key remapping, and camera-roll backup.
- It fixes File History breakage from September security updates and drops PC-to-PC Migration.
- Microsoft says this is the final 24H2 preview before October 2026 end of support.
- Vendors
- Microsoft
- Products
- Windows 11
- Organizations
- Microsoft
From the original article
2 min read at bleepingcomputer.com
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. [...]
By Sergiu Gatlan · bleepingcomputer.com
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