{"family":"windows11","family_label":"Windows 11","build":"26100.9725","base":"26100","tag":"24H2","kb":"KB5134133","kb_url":"https://support.microsoft.com/help/5134133","kb_title":"October 26, 2026—KB5134133 (OS Builds 26300.9725, 26200.9725 and 26100.9725) Out-of-band","release_date":"2026-10-26","update_type":"2026-10 OOB","update_type_label":"Out-of-band update","servicing":"LTSC • General Availability Channel","ms_known_issues":[{"title":null,"symptom":"After installing this update, some devices might be unable to turn on Smart App Control in the Windows Security app if it has been turned off. On affected devices, the option to turn on Smart App Control might be grayed out. Devices where Smart App Control is already turned on are not affected and remain protected. After installing the September 2026 non-security preview update KB5124010 , or later updates, non-admin users might be unable to establish Remote Desktop connections to remote devices that have Administrator protection enabled. Attempts to connect might fail with error 0xC000000D and display the message, “The token that was passed to the function is invalid.” This issue primarily","workaround":"Important: This section contains information about modifying the registry. Before you modify the registry, back it up and make sure that you know how to restore it if a problem occurs. For more information, see How to back up and restore the registry in Windows . Option #1: Modify the registry You can modify the registry to restore the ability to turn on Smart App Control by following these steps: Open a Command Prompt window by typing cmd in the Search box. Open a Command Prompt window by typing cmd in the Search box. Select Run as administrator . Select Run as administrator . At the command prompt, enter the following commands. Then restart the device. reg add \"HKLM\\SYSTEM\\CurrentControlSe","applies_to":"","status":""}],"ms_none_known":false,"ms_highlights":null,"title":"Windows 11, version 24H2 (26100.9725)","build_type":"release","channel_label":"Release","branch":null,"kind":null,"kind_label":null,"is_dotnet":false,"status":null,"line":{"status":"supported","note":"Enterprise/Education supported through 2027-10-12; Home/Pro servicing ended","support":{"enterprise_education":"2027-10-12","home_pro":"ended"},"availability_date":"2024-10-01","source_url":"https://learn.microsoft.com/en-us/windows/release-health/windows11-release-information","verified_at":1793074404,"stale":false,"servicing_exceptions":[{"availability_date":"2024-10-01","latest_build":"26100.9725","servicing":"Long-Term Servicing Channel (LTSC)","support":{"extended":"2034-10-10","mainstream":"2029-10-09"},"support_notes":{"Extended support end date":"2034-10-10","Mainstream support end date":"2029-10-09"},"tag":"24H2","version":"24H2 1"}]},"created":1793050121,"created_iso":"2026-10-26T21:28:41Z","uuid":"4ef76f77-dd31-49a8-9bb5-6de3a2115eb3","permalink":"/builds/windows11/26100.9725/","tag_url":"/builds/windows11/24h2/","index_url":"/builds/windows11/","api_url":"https://search.windowsforum.com/api/builds/build/windows11/26100.9725","records":[{"uuid":"4ef76f77-dd31-49a8-9bb5-6de3a2115eb3","title":"Windows 11, version 24H2 (26100.9725)","build":"26100.9725","arch":"amd64","created":1793050121,"created_iso":"2026-10-26T21:28:41Z","build_type":"release","channel_label":"Release","branch":null,"kind":null,"kind_label":null,"status":null,"kb":null,"download_url":"https://uupdump.net/selectlang.php?id=4ef76f77-dd31-49a8-9bb5-6de3a2115eb3"},{"uuid":"25ad5bb5-221b-4700-8464-35ebb4ebf2b3","title":"Windows 11, version 24H2 (26100.9725)","build":"26100.9725","arch":"arm64","created":1793050118,"created_iso":"2026-10-26T21:28:38Z","build_type":"release","channel_label":"Release","branch":null,"kind":null,"kind_label":null,"status":null,"kb":null,"download_url":"https://uupdump.net/selectlang.php?id=25ad5bb5-221b-4700-8464-35ebb4ebf2b3"}],"summary":"Windows 11, version 24H2 (build 26100.9725) is a Release build issued as an out-of-band update on October 26, 2026; Microsoft notes updated trusted root certificates, refreshed AI components, and a servicing-stack reliability improvement. 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