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Microsoft’s current Windows 11 version 26H1 issue list includes three entries that are still mitigated or partially resolved, plus several issues marked resolved. The problems apply only to specified hardware, services, or configurations—not to every PC running 26H1. Microsoft describes 26H1 as a release for select new devices; it is not a feature update offered through Windows Update to existing devices.

What Windows 11 version 26H1 is—and who gets it

Microsoft says 26H1 is optimized for select new devices built with next-generation silicon developed with device and silicon partners. It is not intended as a feature update for existing devices and will not be offered through Windows Update. Microsoft continues to recommend Windows 11 versions 25H2 and 24H2 for enterprise deployment. See Microsoft’s Windows 11 version 26H1 release-health page for the release description and current issue entries.

The issue statuses below reflect Microsoft’s pages last updated October 2, 2026. They can change, so consult the linked entries for the latest status and version-specific instructions.

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Issues still listed as mitigated or partially resolved

Microsoft does not mark these entries fully resolved. Their scope is specific: match the symptoms and environment before applying any administrator guidance.

Current status Issue and affected environment Origin and symptoms Mitigation or fix
Mitigated; resolution ongoing Black screen or desktop not loading after sign-in, primarily on some Azure Virtual Desktop hosts using FSLogix. Existing profiles may be more affected. Users may see a black screen after sign-in, a session that does not load the desktop automatically, or Windows Explorer crashes. Microsoft’s entry associates the issue with an update; follow the exact version-specific details on its page. Microsoft documents manually launching explorer.exe and a Known Issue Rollback route for managed systems. Follow the official entry’s instructions; Microsoft says work on a resolution continues.
Mitigated; future update planned Some domain-joined devices with Credential Guard-protected machine accounts and an on-premises Active Directory secure channel. After the September 8, 2026 security update or later updates, affected machine accounts may lose their secure trust with the domain. Microsoft describes a temporary mitigation involving Machine Identity Isolation settings and repairing the secure channel. This is administrator-level guidance and is not a general fix for all domain-joined devices; use the official instructions.
Partially resolved USB Audio Class 1.0 devices. Some devices may fail to start or produce sound. The specific multichannel 8-channel or 3D-audio symptoms were addressed, but other symptoms remain under investigation. The September 14, 2026 out-of-band update KB5129194 resolves the 8-channel or 3D-audio symptoms. Microsoft has not marked the full issue resolved.

Microsoft’s detailed status and mitigation steps for these entries are on its 26H1 known issues and notifications page.

Issues Microsoft marks resolved

These issues have named resolving updates or remedies. “Resolved” describes the listed problem in the environments Microsoft identifies; it does not mean every device or application was affected.

Rank #2
Dell Latitude 5420 14" FHD Business Laptop Computer, Intel Quad-Core i5-1145G7, 16GB DDR4 RAM, 256GB SSD, Camera, HDMI, Windows 11 Pro (Renewed)
  • 256 GB SSD of storage.
  • Multitasking is easy with 16GB of RAM
  • Equipped with a blazing fast Core i5 2.00 GHz processor.
Issue and affected environment Origin and symptoms Resolution
Remote Desktop Services instability After the September 8, 2026 security update KB5124012, some environments experienced Remote Desktop Services connection failures, sign-in problems, or hangs at “Please wait for the Remote Desktop Configuration.” Related management tools or Windows Update could also become unresponsive. Microsoft says Windows 365 and Azure Virtual Desktop were not affected. Resolved by the September 14, 2026 out-of-band update KB5129194 and later updates.
Hyper-V Linux guest host-folder shares using Plan9 After KB5124012, some HCS-managed virtual machines could start but fail to expose Windows host folders to Linux guests through Plan9. Microsoft names WSL and Claude Cowork among affected applications. Standard Hyper-V virtual machines not using Plan9 were not affected. Resolved by KB5129194 and later updates. Administrators who applied the temporary Group Policy mitigation must re-enable the policy, install the out-of-band update, and restart.
Teams and new Outlook failing on some ARM devices Following updates from August 11, 2026, Teams and new Outlook could fail to launch or close unexpectedly on some ARM PCs, especially new or freshly imaged devices that had not installed Microsoft Store updates. Resolved by KB5124012, released September 8, 2026. Before that update, Microsoft’s workaround was to update the Auto Super Resolution Package through Microsoft Store.
False notifications that Microsoft Defender was off After Defender update 4.18.26070.9, notifications could incorrectly report that Defender was disabled even though it remained active. Resolved by Defender update 4.18.26080.4, released September 17, 2026. Microsoft recorded the issue as resolved on September 30, 2026.

Microsoft’s resolved issues page for Windows 11 version 26H1 also records earlier items, including July 2026 WSUS synchronization degradation and June 2026 Emoji Panel GIF and Recycle Bin dialog issues. Check that page for each item’s full scope and remedy; these are older resolved entries, not issues identified there as currently active.

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Quick Recap

Bestseller No. 1
Bestseller No. 2
Dell Latitude 5420 14' FHD Business Laptop Computer, Intel Quad-Core i5-1145G7, 16GB DDR4 RAM, 256GB SSD, Camera, HDMI, Windows 11 Pro (Renewed)
Dell Latitude 5420 14" FHD Business Laptop Computer, Intel Quad-Core i5-1145G7, 16GB DDR4 RAM, 256GB SSD, Camera, HDMI, Windows 11 Pro (Renewed)
256 GB SSD of storage.; Multitasking is easy with 16GB of RAM; Equipped with a blazing fast Core i5 2.00 GHz processor.
$285.00
Bestseller No. 3
HP 14' HD Laptop, Windows 11, Intel Celeron Dual-Core Processor Up to 2.60GHz, 4GB RAM, 64GB SSD, Webcam, Dale Pink (Renewed)
HP 14" HD Laptop, Windows 11, Intel Celeron Dual-Core Processor Up to 2.60GHz, 4GB RAM, 64GB SSD, Webcam, Dale Pink (Renewed)
14" diagonal, 1366x768 resolution, HD BrightView LED, Glossy NON-TOUCH Display
$245.99
Best Value
Windows 11 Laptop with i3 Processor 15.6" Work Laptop for College Students
  • 【Efficient Performance】 Powered by Intel Core i3 processor (2 cores, 4 threads, up to 3.4GHz) with 12GB RAM and 256GB SSD. Handles multitasking, office software, online classes, and HD video streaming smoothly. Integrated Intel UHD Graphics 620
  • Backlit Keyboard & Complete Package】Comes with a cool backlit keyboard. Comes with awebcam, dual stereo speakers (8Ω/1.0W each), DC charger, and user manual – ready for late-night studying, online classes, video conferencing, and daily productivity
  • 【Vibrant Display】 15.6-inch Full HD (1920x1080) anti-glare screen with 16:9 aspect ratio delivers crisp images and vivid colors – perfect for studying, watching lectures, or entertainment. Thin-bezel design maximizes viewing area
  • 【Fast Connectivity & Expansion】 Equipped with WiFi 6 (802.11ax) and Bluetooth 5.2 for stable, high-speed wireless. Features 3 x USB 3.0, HDMI 2.1, Type-C (supports PD3.0 fast charging), and a TF card slot expandable up to 2TB – easily connect external monitors, mice, drives, or expand storage for all your files
  • 【Long Battery Life & Portable】 Built-in 11.55V 5000mAh/57.75Wh high-capacity battery delivers approximately 7 hours of mixed-use battery life – enough for a full day of classes and assignments. Lightweight at just 1.63kg (3.6 lbs) and 19.5mm thin, plus a compact packing size – easily slips into a backpack for campus, library, or coffee shop
Rank #4
15.6 Inch Laptop Computer, N4020, 4GB DDR4 RAM, 128GB eMMC,with Windows 11
  • EFFORTLESS EVERYDAY PERFORMANCE: Powered by Intel Celeron N4020 processor and Windows 11 Home system, delivering reliable, low-power efficiency for daily tasks like document editing, email, online classes, and web browsing
  • 15.6-INCH FULL HD DISPLAY: Enjoy immersive visuals on the 15.6" FHD (1920x1080) anti-glare screen with micro-edge bezels. Delivers clear details and comfortable viewing for long study sessions, working on spreadsheets, and video playback
  • RESPONSIVE MULTITASKING & STORAGE: Built with 4GB LPDDR4 RAM and 128GB eMMC storage for smooth daily essential use. Expand your storage by up to 1TB via the integrated TF card slot to easily store movies, photos, and working files
  • ADVANCED CONNECTIVITY: Outfitted with 2x Full-Featured Type-C ports for data transfer, fast charging, and dual-monitor output, alongside 2x USB 3.2 Gen1 ports and a 3.5mm audio jack for complete peripheral compatibility
  • LIGHTWEIGHT & SILENT OPERATION: Slim and portable for effortless travel or commuting. Features a 1MP HD webcam for remote meetings, 38Wh battery with 45W Type-C fast charging, and a fanless silent design for peaceful work environments.
Rank #3
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How to use the issue list

  1. Confirm the environment. Check whether the affected component or configuration in Microsoft’s entry matches your system—for example, FSLogix on an Azure Virtual Desktop host, a Credential Guard-protected domain machine account, a USB Audio Class 1.0 device, an ARM PC, or a Plan9 share.
  2. Match the update and symptoms. Compare the update identifier or date and the described behavior with the entry. An issue appearing in the list does not establish that it affects every 26H1 installation.
  3. Follow the status-specific guidance. For a mitigated or partially resolved issue, use Microsoft’s current instructions rather than treating a mitigation as a complete fix. For a resolved issue, check whether the named update is installed and whether the entry’s conditions apply.
  4. Recheck Microsoft’s pages. Issue status can change; the known-issues and resolved-issues pages reported an October 2, 2026 update when last checked.

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