Windows 11 KB5124010 Is the Final 24H2 Preview Update

Microsoft released KB5124010 on September 22, 2026 as a non-security preview for Windows 11 versions 24H2 and 25H2. The update moves 25H2 to OS build 26200.9550 and 24H2 to build 26100.9550, while previewing changes that can later flow into normal cumulative servicing.

The lifecycle detail is the important part for 24H2 users: Microsoft says KB5124010 is the final non-security preview update for Windows 11 24H2. Home and Pro editions reach end of updates on October 13, 2026, while Enterprise and Education remain supported until October 12, 2027. Supported 24H2 editions continue receiving monthly security updates according to their lifecycle; the end of preview releases is not the same thing as every 24H2 edition becoming unsupported immediately.

One of the more practical user-facing changes is a new setting for remapping the dedicated Copilot key. Microsoft says KB5124010 can assign that key to Right Ctrl or the Context Menu function, giving users a first-party way to reclaim it for more conventional keyboard workflows.

This is a bounded remapping feature, not a general-purpose macro system. Microsoft's release notes name Right Ctrl and Context Menu as the new choices, so the update should not be described as allowing the Copilot key to become any arbitrary key or application shortcut.

File Explorer's preview pane now offers a Preview anyway button for HTML files downloaded from the web after the user acknowledges the warning, while Microsoft says non-HTML files such as PDFs are previewed automatically. Explorer Home also remembers whether its sections were expanded or collapsed, and Microsoft lists reliability improvements for cloud-file thumbnails and the address bar.

Precision-touchpad settings gain single-finger edge scrolling and automatic scrolling near the touchpad edge. Accessibility settings also add Open apps maximized, which automatically maximizes application windows when they open, while Magnifier receives a visual refresh without changing its existing views, zoom controls, shortcuts or Read Aloud behavior.

The release notes explicitly state that PC-to-PC Migration is no longer available and direct users to Windows Backup for moving supported files and settings to a new PC. Core Tech Tips has covered that retirement separately because the migration feature has its own durable search intent; here it is one item in the broader KB5124010 release rather than the focus of the story.

Other changes include Emoji 17.0 support, improvements to desktop-background behavior, app-version visibility in Installed apps, camera-setting persistence, kiosk shortcut restrictions, Windows Recovery management support for MDM providers, and a fix for plugged-in laptops that could incorrectly detect a transition from AC to battery power.

Microsoft's lifecycle notice makes the timing relevant beyond the individual fixes. Windows 11 24H2 Home and Pro stop receiving monthly security and preview updates after October 13, 2026. Microsoft recommends moving to a newer Windows 11 version to remain supported.

Enterprise and Education have a different deadline and remain supported through October 12, 2027, so organizations should not apply the Home and Pro date indiscriminately to every 24H2 installation. The practical action is to identify the installed Windows edition and version before treating the October deadline as applicable.