Windows 11 version 26H1 End of Servicing on March 14, 2028
What to know about Windows 11 version 26H1
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Current status as of February 10, 2026
Windows 11, version 26H1 is a hardware-optimized release designed to enable next-generation silicon developed in partnership with device manufacturers and silicon partners. This release will be available exclusively as a preinstalled experience on select new devices beginning in early 2026, with capabilities tailored specifically for those platforms.
Windows 11, version 26H1 is not intended as a feature update for existing devices and will not be offered through Windows Update. Devices running Windows 11, versions 25H2 and 24H2 will continue receiving monthly security and quality updates, as well as new features, and remain supported according to servicing timelines and Microsoft lifecycle policies.
For IT admins, Windows 11, versions 25H2 and 24H2 remain the recommended releases for enterprise deployment. While Windows 11, version 26H1 is not intended for broad deployment across existing Windows 11 environments, organizations evaluating new hardware platforms may adopt it selectively without affecting their broader environment. For more information, see What to know about Windows 11, version 26H1. For servicing and lifecycle information, see Windows 11 release information, Windows Lifecycle FAQ, and Microsoft Lifecycle Policy search tool.
Windows 11, version 26H1 known issues and notifications
Summary | Originating update | Status | Last updated |
|---|---|---|---|
| Domain-joined devices might lose their secure trust relationship with the domain Some Credential Guard protected machine accounts might be unable to sign in interactively will valid domain credentials. | OS Build 28000.2954 KB5124012 2026-09-08 | Resolved KB5124006 | 2026-10-08 17:44 PT |
| Incorrect notifications that "Microsoft Defender Antivirus is turned off" Microsoft Defender Antivirus remains active and functioning correctly despite notifications following the latest update. | N/A | Resolved | 2026-09-30 16:42 PT |
| Devices might experience a black screen or desktop loading issues after sign-in Microsoft has received reports of this issue occurring in some virtual desktop environments. | OS Build 28000.2804 KB5120996 2026-08-27 | Mitigated | 2026-09-29 10:12 PT |
| USB audio devices might fail to start or produce no sound Some USB Audio Class 1.0 devices display Code 10 or fail in multichannel audio modes after installing KB5124008. | OS Build 28000.2954 KB5124012 2026-09-08 | Mitigated | 2026-09-29 10:12 PT |
| Remote Desktop Services might stop responding after Sept. 2026 security update Some Windows devices with Remote Desktop enabled might experience Remote Desktop Services (RDS) instability. | OS Build 28000.2954 KB5124012 2026-09-08 | Resolved KB5129194 | 2026-09-17 19:22 PT |
| Host folder shares might be unavailable in Hyper-V-based Linux VMs Plan9 host folder shares might not appear in the guest environment after installing the September 2026 security update. | OS Build 28000.2954 KB5124012 2026-09-08 | Resolved KB5129194 | 2026-09-14 13:30 PT |
| Microsoft Teams and Outlook might fail to launch on ARM-based devices This most likely occurs on new PCs after installing the August Windows security update and does not affect other apps. | OS Build 28000.2704 KB5121000 2026-08-11 | Resolved KB5124012 | 2026-09-08 11:37 PT |
Resolved issues in Windows 11, version 26H1
| Summary | Originating update | Status | Date resolved |
|---|---|---|---|
| Domain-joined devices might lose their secure trust relationship with the domain Some Credential Guard protected machine accounts might be unable to sign in interactively will valid domain credentials. | OS Build 28000.2954 KB5124012 2026-09-08 | Resolved KB5124006 | 2026-10-08 17:09 PT |
| Incorrect notifications that "Microsoft Defender Antivirus is turned off" Microsoft Defender Antivirus remains active and functioning correctly despite notifications following the latest update. | N/A | Resolved | 2026-09-17 18:22 PT |
| Host folder shares might be unavailable in Hyper-V-based Linux VMs Plan9 host folder shares might not appear in the guest environment after installing the September 2026 security update. | OS Build 28000.2954 KB5124012 2026-09-08 | Resolved KB5129194 | 2026-09-14 10:57 PT |
| Remote Desktop Services might stop responding after Sept. 2026 security update Some Windows devices with Remote Desktop enabled might experience Remote Desktop Services (RDS) instability. | OS Build 28000.2954 KB5124012 2026-09-08 | Resolved KB5129194 | 2026-09-14 10:57 PT |
| Microsoft Teams and Outlook might fail to launch on ARM-based devices This most likely occurs on new PCs after installing the August Windows security update and does not affect other apps. | OS Build 28000.2704 KB5121000 2026-08-11 | Resolved KB5124012 | 2026-09-08 11:37 PT |
| Windows Server Update Service sync operations might have issues or time out Remediation efforts are underway. Synchronization times are expected to return to normal as recovery progresses. | N/A | Resolved | 2026-07-20 13:22 PT |
| GIF functionality in the Windows Emoji Panel might become unavailable This issue occurs because the previous GIF provider (Tenor) retired its service on June 30, 2026. | N/A | Resolved KB5095091 | 2026-06-23 10:00 PT |
| Deleting a file from the Recycle Bin displays an internal filename in the dialog This issue only occurs within the confirmation dialog after installing the June Windows security update. | OS Build 28000.2269 KB5095051 2026-06-09 | Resolved KB5095091 | 2026-06-23 10:00 PT |
