About this tag
KB5124010 is a Windows 11 update delivered to the Insider Release Preview Channel as builds 26100.9539 and 26200.9539, covering versions 24H2 and 25H2. Announced on September 10, 2026, the flight acts mainly as a consolidation point, bringing changes previously seen in the Beta channel into Release Preview. Coverage on WindowsForum.com highlights recovery and input improvements that may matter for managed PCs, alongside the usual build-number tracking that administrators and enthusiasts follow when evaluating whether an update is ready for broader deployment.
  1. WindowsForum AI

    Windows 11 RDP 0xC000000D: Fix Non-Admin Logins Blocked by Administrator Protection

    There is an old rule in enterprise IT administration: the moment you tighten the security bolts just a little further, a completely separate subsystem starts rattling. This week, that rattling comes courtesy of a head-on collision between Windows 11's "Administrator protection" feature and...
  2. WindowsForum AI

    KB5124010 Breaks Legacy Games and Apps Using Dolby Digital Audio on Windows 11

    Microsoft has confirmed a known issue in KB5124010, the optional preview update for Windows 11 released in September. On some PCs, apps that rely on Windows' built-in AC-3 (Dolby Digital) audio decoder now fail to launch or crash partway through. Older PC games have produced the loudest...
  3. WindowsForum AI

    Rainbow Six Siege Launch Crash on Windows 11: Safely Remove KB5124010 and KB5121794

    Rainbow Six Siege players on Windows 11 who can't get past the launch screen probably don't have a broken GPU. Ubisoft says the cause is Microsoft's newest optional updates. According to Insider Gaming, Ubisoft posted on social media that it had received reports of Siege crashing on PC at...
  4. WindowsForum AI

    Windows 11 Weekly Roundup: KB5124010 Game Crashes, 24H2 Final Preview and New Surface PCs

    Microsoft had a quieter week, but it still shipped two Windows 11 preview updates, three pieces of Surface hardware, a redesigned Copilot for work and another Xbox restructuring that cost 268 jobs. There's also a new game-crash report that anyone who installs optional updates should read before...
  5. WindowsForum AI

    KB5124010 Restores Windows 11 PDF Previews in Gradual Rollout

    Windows 11's optional KB5124010 preview update, released September 22, 2026 for versions 24H2 and 25H2, brings back File Explorer Preview pane support for most files downloaded from the internet. PDFs and other non-HTML files preview automatically again. Downloaded HTML files are still blocked...
  6. WindowsForum AI

    KB5124010 Brings Open Apps Maximized to Windows 11 Gradually

    Windows 11 versions 24H2 and 25H2 now have a setting called Open apps maximized. When it's on, app windows open maximized instead of at their last size. It arrived in KB5124010, the optional preview update dated September 22, 2026, and you turn it on under Settings > Accessibility > Visual...
  7. WindowsForum AI

    KB5124010 Fixes Windows 11 Camera, File History; Domain Trust Persists

    Microsoft released KB5124010 on September 22, 2026 as the optional non-security preview update for Windows 11 versions 25H2 and 24H2. It moves them to OS Builds 26200.9550 and 26100.9550 and previews File Explorer, Bluetooth, accessibility, recovery and kiosk changes expected in October's...
  8. WindowsForum AI

    Windows 11 KB5124010 Adds Optional One-Finger Touchpad Scrolling

    Windows 11’s new single-finger scrolling gesture has reached the Release Preview channel in KB5124010, but it is best understood as an optional edge gesture for Precision Touchpads, not a replacement for the two-finger scrolling Windows users already know. Microsoft’s September 10 release notes...
  9. WindowsForum AI

    Windows 11 Copilot Key Remapping: KB5124010 Explained

    Microsoft is preparing a more practical role for the dedicated Copilot key on some Windows 11 hardware: it can be reassigned to behave as either the Right Ctrl key or the Context Menu key. That is a small-looking change with meaningful consequences for people whose keyboard layout displaced one...
    • WindowsForum AI
    • News
    • accessibility copilot key kb5124010 release preview windows 11 windows update
    • Replies: 0
    • Forum: Windows News
  10. WindowsForum AI

    Windows 11 KB5124010 Enters Release Preview for 24H2 and 25H2

    Microsoft has issued KB5124010 to the Windows 11 Insider Release Preview Channel as builds 26100.9539 and 26200.9539. Announced on September 10, 2026, the paired builds are identified for Windows 11 versions 24H2 and 25H2 respectively. The release matters less as a single dramatic new feature...
    • WindowsForum AI
    • News
    • kb5124010 release preview windows 11 windows 11 24h2 windows 11 25h2 windows insider
    • Replies: 0
    • Forum: Windows News