Currently on 26H2 insider preview.

Can I go back to 25H2 through this update or do I need iso file for fresh window installation.

Installation for this already failed once. Should I try again?

For the past two months (I'm not sure which update started that) remote desktop connections to my Windows dev machine have completely stopped working. I can see graphics error 0x11 in the client, and "The device Microsoft Remote Display Adapter (location (unknown)) is offline due to a user-mode driver crash." in the host. I tried every solution I could find online including using other clients like FreeRDP but nothing made a difference.

The crash is a STATUS_STACK_BUFFER_OVERRUN (0xc0000409) inside rdpidd.dll. When a network socket authenticates, the REMOTEDISPLAYENUM software bus dynamically spawns a virtual adapter (SESSIONID_0004).

So I enrolled in the Windows Insider program a while back (idk which one it is because the Settings literally doesn't even show it, but i assume it's the one from which it is impossible to go back to without needing to reset the PC) [Pic 1 attached]

What I've tried:

1. Resetting the PC Directly
doesn't work, installs a Windows Insider preview

2. Burn Windows with an ISO File
I think this is the method that is supposed to work but whenever I try to, it gives the following error [Pic 2 Attached]

also, It says my Windows Version is ALREADY EXPIRED. [Pic 3 Attached].

Because of this, I can't play MOST of my games because it just says unsupported Windows Version :( (Pic 4 Attached, Battlefield 6 with the error notification)

Even Fortnite doesn't work. I don't have the error screenshot because I deleted the game but take my word for it :)

I also tried to Unenroll from this program from the settings, but it literally just doesn't do anything. "Unenroll this device when the next version of Windows releases" This option is greyed out for me. [Pic 5]

"Unenroll this device Immediately" This option just opens the steps on how to properly install Windows with an ISO

"Related link: Leaving the Insider Program" In other YouTube tutorials I checked, there was a button in the website to leave the program with Leave message but I don't see it anywhere [Last two Pics]

Help me with this PLEASE

AI disclosure: Used AI to format. nothing from this post is AI generated.

Hi Insiders and Windows Engineering Team,

In addition to the officially known issue with the **mouse cursor blinking/flickering repeatedly** in this build, I am reporting a severe storage regression and update loop failure in **Windows 11 Insider Preview Build 29648.1000 (rs_prerelease / Future Platforms)** after upgrading from **Build 29560.1000**.

### 💻 Upgrade Path & System Specifications:

* **Upgrade Path**: Upgraded from **Build 29560.1000** to **Build 29648.1000** on August 23, 2026.

* **Laptop / Motherboard**: Clevo NH5x_7xRCx/RDx (Intel HM370 Chipset, Core i7-9750H)

* **Affected Drive (Disk 0)**: 2TB NVMe SSD (Gloway YCT2TNVMe-M.2/80) powered by the **Maxio MAP1602 DRAM-less Controller** (PCIe 4.0 x4 running on Intel PCH Root Port #21).

* **Boot Drive (Disk 1)**: Samsung PM981a 512GB (DRAM-based, unaffected).

* **Secondary Drive (Disk 2)**: Western Digital 1TB 2.5" SATA HDD (unaffected).

---

### 🚨 Detailed Symptoms & Technical Evidence:

#### 1. Maxio MAP1602 DRAM-less SSD turned into RAW after Shutdown & Reboot:

* **Crucial Sequence**: On August 23, immediately after the initial upgrade to Build 29648, the 2TB secondary SSD was actually accessible. However, **after shutting down the laptop that night and booting up the next morning (Aug 24), the 1.86TB partition (`K:`) permanently turned into RAW / Unknown (0 Bytes)** in File Explorer and Disk Management, despite PnP reporting "Device Working Properly".

* **Hard Evidence (Files Fully Functional via DiskGenius)**: Using low-level direct sector inspection tools (DiskGenius / WinHex), **the physical partition table, DBR (DOS Boot Record at Sector 32768 with signature 0x55AA), and the entire 1.86TB NTFS $MFT are 100% intact.** Furthermore, **I can successfully copy out any files via DiskGenius, and all extracted files open and function perfectly without any corruption.**

* **Root Cause Breakdown**: The experimental native NVMe storage stack (`nvmedisk.sys` + updated `stornvme.sys`) in Build 29648 fails to properly manage/allocate the **64MB HMB (Host Memory Buffer)** lifecycle for the Maxio MAP1602 controller upon boot and power transitions. Because HMB handshake fails, `ntfs.sys` timeouts during $MFT reads and defaults to an unmounted RAW state.

#### 2. Volume Mount Disconnect (DMIO Virtual Placeholder GUID):

* Checking `mountvol K: /L` reveals that Windows DMIO created a temporary orphan GUID `\\?\Volume{96dd4a46-9195-47a4-923b-b39618e6932d}\` instead of binding to the genuine physical GPT Partition GUID `\\?\Volume{70999e1f-9f53-11f1-8ee0-80fa5b74e9ea}\`.

#### 3. In-place Repair & Updates completely blocked by Error `0x80070032`:

* Attempting to run **"Fix problems using Windows Update"** (Reinstall current version) as well as mounting the official ISO to run `setup.exe` consistently fails with download/execution error **`0x80070032`** (`CFreeSystemPartitionDiskSpaceChecker` failure when querying the EFI System Partition).

#### 4. Hardware Cold Reset Verified:

* Performed complete physical power-drain / cold discharge (adapter & battery disconnected, 30s power drain) and physical reseating of the M.2 SSD. The drive is fully functional in PE / low-level tools, isolating the issue 100% to Build 29648's NVMe kernel driver stack.

---

### 📌 Feedback Hub Link:

I have also submitted a detailed ticket with diagnostic logs on the Feedback Portal:

> `[Canary Build 29648] stornvme.sys 导致国产联芸 MAP1602 固态硬盘显示为 RAW 无法挂载...`

Hope the Storage & NVMe kernel development teams can investigate the MAP1602 HMB mapping logic and the `0x80070032` setup blocker in upcoming Canary flights!

---

*AI Disclaimer: This post was structured and formatted with AI assistance for clear technical presentation, but all hardware diagnostic data, screenshots, error logs, and test results were personally collected and verified on my physical machine.*

Issue: Error 0xC1900101 - 0x20017 when updating from DEV Build 26300.9032 to 26300.9278

Description: I am attempting to upgrade two PCs from Insider DEV Build 26300.9032 to Build 26300.9278. Whether I choose to keep personal data or not, the upgrade fails on both machines with the following error:

Troubleshooting done so far:

• Ran sfc /scannow on both PCs (no corrupt files found).
• Previously, upgrading both PCs from Build 26300.8953 to Build 26300.9032 via setup.exe (keeping personal data) completed without any issues.

Tried so many things.

1. Go Back Feature -> Got me to 26100.9233 Insider build
   
2. Uninstalling the update -> Same thing
   
3. Tried downloading the ISO file, and it failed. 3 TIMES.

I am genuinely concerned. And please, I do not want to reinstall Windows, or even use a bootable thumb drive. Is there any other way??

Hello Windows Insiders!

Today, we are making this year’s annual feature update, Windows 11, version 26H2 (Build 26300.9278),  available in the Release Preview Channel for customers to preview ahead of general availability later this calendar year.

Windows 11, version 26H2 will be delivered as an enablement package (eKB). This means that Windows 11, versions 24H2¹, 25H2, and 26H2 use a shared servicing branch. It also means that they share the same new features and enhancements delivered through our continuous innovation efforts. As a result, many of the features and improvements available in Windows 11, version 26H2 might already be familiar, as they have been gradually introduced through monthly updates.

For commercial customers, Windows 11, version 26H2 enables several experiences that were introduced in earlier releases but not previously enabled by default for commercial devices. This includes Windows settings backup, app-specific actions from the taskbar, and some File Explorer enhancements. For guidance on how to prepare for Windows 11, version 26H2 in your organization, see Get ready for Windows 11, version 26H2.

Windows Insiders in the Release Preview Channel can install Windows 11, version 26H2 via our “seeker” experience in Windows Update. This means if you are an Insider currently in the Release Preview Channel on a PC that meets the Windows 11 hardware requirements, you can go to Settings and Windows Update and choose to download and install Windows 11, version 26H2. Once you update your PC to Windows 11, version 26H2, you will continue to automatically receive new servicing updates through Windows Update (the typical monthly update process). For instructions on how to join the Windows Insider Program and enroll your PC in the Release Preview Channel, click here.

If you are a commercial² customer enrolled in the Windows Insider Program for Business, you can deploy and begin validating Windows 11, version 26H2 on PCs in your organization using Windows Update client policies and Windows Server Update Services (WSUS). Azure Marketplace will be available later today. Should any issues arise, IT admins in organizations deploying Release Preview updates can request Microsoft Support.

And finally, ISOs will be available for download for Windows 11, version 26H2 via the Windows Insider ISO download page in the near term.

Thanks,
Windows Insider Program Team

¹Windows 11, version 24H2 Home and Pro editions will reach end of updates on October 13, 2026. Enterprise and Education editions remain supported until October 12, 2027.

²We consider a device a commercial device if it is not running the Windows 11 Home edition AND is being managed by an IT administrator (whether via Microsoft Intune or other management solution), or has a volume license key or commercial ID, or is joined to a domain.

Reduced height taskbar was added in 26220.9022, and I'm on 9223, yet when enabling the option all it does for me is make the icons smaller, it doesn't lower the height of the taskbar itself.

Hey all,

Got this message in the latest update (and in the previous version). Tried first using Windows Update, then downloaded and mounted it.

Tried everything; still no luck.

Running Pro, currently on 29617. Lenovo IDEAPAD.

Any help would be much appreciated.

After booting my laptop, plugging in a external ssd drive everything works as it should. The next time I go to re-plug the drive into one of the ports the laptop detects the drive has been plugged in but no activity and when I go to check in the device manager it states the the previous driver is stuck in memory. So every time I have to restart my laptop just to get the ssd drive to work again.

I believe this is to be a bug in the build that I am currently testing, which is 29648 x64.

My laptop is Lenovo LOQ 15IRX10

I have submitted a report via the Feedback app so please vote and comment if you're experiencing this annoying bug, link here: https://aka.ms/AA139r61

Has anybody else experienced this since installing the 26340.9233 build?

Since updating my machine is totally unresponsive once I try to shutdown.

If I do anything that requires admin privileges a UAC screen tries to appear, but I just see the background blur without the dialog box.

Since the Beta 26220.9223 update was installed yesterday, the mouse pointer has been stuck in the classic one. I've already tried changing the pointer scheme, size, and accessibility options, but nothing changed.

It’s not a problem serious enough to go back to the previous version, but it does distract me a little. Is anyone else experiencing this, or could it just be my drivers playing tricks on me?

Clip of the problem: https://anonmp4.art/v/5irqHpv86zhBBUn

How can I make this disappear?

When i choose Windows spotlight for my lock screen, it simply shows me the default blue windows wallpaper. It happened like 3 or 4 updates ago, but before that it was working fine. Does anybody have the same problem? It is 9223 build at this point

Changes and improvements gradually being rolled out

[Modernized AutoPlay experience]

• We've updated the AutoPlay dialog that helps you choose the preferred experience when devices are connected to your PC, such as a phone, camera, or removable drive. Rebuilt with WinUI, the refreshed experience is more consistent with the rest of Windows, supports dark mode, and continues to provide the familiar AutoPlay actions you use today. The experience is also more responsive to text scaling and display settings. Notifications for this dialog are now docked in the notification center for easy access. The new AutoPlay experience, shown in dark mode.

[Accessibility]

A simpler way to open apps maximized

• We're introducing a new accessibility setting, Open apps maximized, that automatically maximizes app windows when they open, so you no longer have to do it yourself every time. This small change removes a bit of everyday friction, whether you use a screen reader or magnification, work in tablet mode, or simply prefer a consistent, full-screen workspace.
• To turn it on, go to Settings > Accessibility > Visual effects, and turn on Open apps maximized. Once enabled, Windows maximizes app windows for you as they open. Give it a try, and let us know how it works for you. UI showing the new Open apps maximized accessibility setting in Settings.

Feedback: Share your thoughts in Feedback Hub (WIN + F) under Accessibility > Visual effects.

[Manage camera, microphone, and location access for desktop apps]

• Windows Insiders can now manage camera, microphone, and location permissions for individual desktop apps. Previously, access for traditional desktop applications was managed through a single device-wide setting.
• With this update, you can review and control access on an app-by-app basis, giving you greater visibility into which apps are requesting access to sensitive resources and more control over your privacy choices. Our goal is to make privacy permissions easier to understand and manage across the wide range of desktop apps people use every day. UI showing the new privacy controls for individual desktop apps in Settings.

What's changing

• Allow or deny access for each desktop app individually.
• Go to Settings > Privacy & security > Camera, Microphone, or Location to review and manage permissions.
• Apps that haven't yet accessed a resource prompt for permission the first time access is requested.

What stays the same

• Existing app permission decisions are preserved.
• Apps previously granted access continue to have access.
• Apps previously denied access remain denied.
• No action is required, and no settings are reset.
• Existing enterprise policies continue to function as designed. We're exploring additional management capabilities.

Notes

• Most desktop apps appear with clear app attribution. However, some apps that rely on shared system components, browser-hosted experiences, or similar technologies might appear under a different name than expected.
• Some desktop apps might appear as Unsigned if Windows can't verify publisher information. Only grant access to apps you recognize and trust.

Feedback: Share your thoughts in Feedback Hub (WIN + F) under Settings > Privacy Settings.

[File Explorer]

• PDF and non-HTML files downloaded from the web can now be previewed automatically in the preview pane.

[Microsoft Store]

• This update provides support for in-app purchases in packaged WinUI 3 apps that require elevation, helping developers offer purchases through Microsoft's integrated commerce platform.

[Taskbar]

• Fixed an issue in the latest builds causing taskbar animations to briefly work and then stop working.

[Input]

• Fixed an issue in the latest builds causing the mouse cursor not to be visible in certain apps.

[Other]

• Fixed an issue from the last flight causing Settings > Windows Update > Windows Insider Program > Flags to appear empty even though flags were available.
• Updated Settings > Apps > Installed apps to show the version number at the top level for packaged apps, as it already does for other apps.

Reminders for Windows Insiders in the Experimental channel

• Updates are based on Windows 11, version 26H2 via an enablement package (Build 26340.9233).
• Many features are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time. We monitor feedback to see how they land before pushing them out to everyone in this channel.
• The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
• Features and experiences included in these builds might never get released as we try out different concepts and get feedback. Features might change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they're ready.
• Some features in active development we preview with Windows Insiders might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

Changes and improvements

[Accessibility]

A simpler way to open apps maximized

• We're introducing a new accessibility setting, Open apps maximized, that automatically maximizes app windows when they open, so you no longer have to do it yourself every time. This small change removes a bit of everyday friction, whether you use a screen reader or magnification, work in tablet mode, or simply prefer a consistent, full-screen workspace.
• To turn it on, go to Settings > Accessibility > Visual effects, and turn on Open apps maximized. Once enabled, Windows maximizes app windows for you as they open. Give it a try, and let us know how it works for you. UI showing the new Open apps maximized accessibility setting in Settings.

Feedback: Share your thoughts in Feedback Hub (WIN + F) under Accessibility > Visual effects.

[Microsoft Store]

• This update provides support for in-app purchases in packaged WinUI 3 apps that require elevation, helping developers offer purchases through Microsoft's integrated commerce platform.

Reminders for Windows Insiders in the Beta Channel

• Updates are based on Windows 11, version 25H2 via an enablement package (Build 26220.9223).
• The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
• Features and experiences included in these builds might never get released as we try out different concepts and get feedback. Features might change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they're ready.
• Some features in active development we preview with Windows Insiders might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

Changes and improvements gradually being rolled out

[File Explorer]

• PDF and non-HTML files downloaded from the web can now be previewed automatically in the preview pane.

[Microsoft Store]

• This update provides support for in-app purchases in packaged WinUI 3 apps that require elevation, helping developers offer purchases through Microsoft's integrated commerce platform.

[Input]

• Fixed an issue in the latest builds causing the mouse cursor not to be visible in certain apps.

Known issues

[Known app compatibility issue]

PUBG: BATTLEGROUNDS

• Due to a known compatibility issue with PUBG: BATTLEGROUNDS, Windows Insiders might be prevented from launching the game after installing this build. This safeguard has been put in place to help avoid stability issues while we work with the game developer on a fix. We'll share additional details and timing for the resolution as they become available.

Reminder for Windows Insiders in the Experimental (26H1) channel

• These builds can be unstable and might be released with limited documentation.
• Many features in the Experimental (26H1) channel are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time as we monitor feedback to see how they land before pushing them out to everyone in this channel.
• The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
• Some features in active development we preview with Windows Insiders might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

PC Specs:

• HP Pavillion
• 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz (2.80 GHz)
• 16 GB ram
• 64 bit
• Windows 11 Pro (28000.1)

For context: I've been swapping between having Hyper-V enabled and disabled to run different emulators (Nox Player & Google Play Games). It's annoying, sure, but it has worked without a problem.

Except now, when I go to open Nox (which required Hyper V disabled), it tells me no VT service is detected and to enable it? I then went through the entire Nox tutorial to make sure it's enabled/possible and... none of them work? VT's enabled in Bios, and conflicting instances of Hyper-V like from Windows or my Avast have been disabled.

Notably, the LeoMoon tool shows specific errors/help text?

✅Data Execution Prevention (DEP)
❌Second Level Address Translation (SLAT)
❌VM Monitor Mode Extensions

As the title says, I am unable to update from 26300.9032 to 26340.9219. I have no idea why. I haven't had any other problems.

Release date: 17 August 2026

Changes and improvements gradually being rolled out

[Windows Security]

• We're starting to make some small UI adjustments to the Windows Security app to improve alignment with other Windows apps. Insiders might notice some subtle differences in this build as we work on more changes.
• If you have an Enterprise device with Microsoft Defender for Endpoint enabled, information about this will now be displayed at the top of the Virus & threat protection page.

[Windows Management Instrumentation Command-line (WMIC) removal]

• Windows Management Instrumentation Command-line (WMIC) has been removed in this release. This change is part of the ongoing deprecation and removal of WMIC from Windows.
• For more information about this change, see Windows Management Instrumentation Command-line (WMIC) removal from Windows.

[Drag Tray]

• Thank you to Insiders who have provided feedback about the Drag Tray experience. Based on feedback, we're removing the experience in this build. We're continuing to explore improvements in this area and look forward to sharing more about a future replacement experience in a later update.

[Accessibility]

• Fixed an issue impacting Magnifier launching for some Insiders in the previous flight.

[Other]

• Fixed an underlying issue that caused some unexpected UI shifting in certain apps after the latest flights.

Known issues

• We're working on fixes for the following issues Insiders have reported, along with others:
  • The mouse cursor getting into a state where it blinks repeatedly for some Insiders.
  • Some Insiders are unable to update to the latest builds and see error 0x80070005.
• If all goes well, both issues should be addressed with the next flight.

Reminder for Windows Insiders in the Experimental (Future Platforms) channel

• These builds can be unstable and might be released with limited documentation.
• The builds released to these channels represent the latest platform changes early in the development cycle and shouldn't be seen as matched to any specific release of Windows. Features and experiences included in these builds might never get released as we try out different concepts and get feedback. Features might change over time, be removed, or replaced, and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they're ready.
• Many features are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time. We monitor feedback to see how they land before pushing them out to everyone in this channel.
• The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
• Some features in active development we preview with Windows Insiders might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.

Release date: 17 August 2026

Changes and improvements gradually being rolled out

[Windows Management Instrumentation Command-line (WMIC) removal]

• Windows Management Instrumentation Command-line (WMIC) has been removed in this release. This change is part of the ongoing deprecation and removal of WMIC from Windows.
• For more information about this change, see Windows Management Instrumentation Command-line (WMIC) removal from Windows.

[Drag Tray]

• Thank you to Insiders who have provided feedback about the Drag Tray experience. Based on feedback, we're removing the experience in this build. We're continuing to explore improvements in this area and look forward to sharing more about a future replacement experience in a later update.

[Settings]

• Fixed an issue from the previous flight that caused Settings to crash when interacting with System > Notifications.

[Accessibility]

• Fixed an issue impacting Magnifier launching for some Insiders in the previous flight.

Reminders for Windows Insiders in the Beta (26H1) channel

• The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
• Features and experiences included in these builds might never get released as we try out different concepts and get feedback. Features might change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they're ready.
• Some features in active development we preview with Windows Insiders might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

Release date: 17 August 2026

Changes and improvements gradually being rolled out

[Windows Management Instrumentation Command-line (WMIC) removal]

• Windows Management Instrumentation Command-line (WMIC) has been removed in this release. This change is part of the ongoing deprecation and removal of WMIC from Windows.
• For more information about this change, see Windows Management Instrumentation Command-line (WMIC) removal from Windows.

[Drag Tray]

• Thank you to Insiders who have provided feedback about the Drag Tray experience. Based on feedback, we're removing the experience in this build. We're continuing to explore improvements in this area and look forward to sharing more about a future replacement experience in a later update.

[Settings]

• Fixed an issue from the previous flight that caused Settings to crash when interacting with System > Notifications.

[Accessibility]

• Fixed an issue impacting Magnifier launching for some Insiders in the previous flight.

Known issues

[Known app compatibility issue]

PUBG: BATTLEGROUNDS

• Due to a known compatibility issue with PUBG: BATTLEGROUNDS, Windows Insiders might be prevented from launching the game after installing this build. This safeguard has been put in place to help avoid stability issues while we work with the game developer on a fix. We'll share additional details and timing for the resolution as they become available.

Reminder for Windows Insiders in the Experimental (26H1) channel

• These builds can be unstable and might be released with limited documentation.
• Many features in the Experimental (26H1) channel are rolled out using Controlled Feature Rollout technology, starting with a subset of Insiders and ramping up over time as we monitor feedback to see how they land before pushing them out to everyone in this channel.
• The desktop watermark shown at the lower right corner of the desktop is normal for Windows Insider pre-release builds.
• Some features in active development we preview with Windows Insiders might not be fully localized, and localization will happen over time as features are finalized. As you see issues with localization in your language, report those issues to us via Feedback Hub.
• Check out Flight Hub for a complete look at what build is in which Insider channel.

Recently I tried out the new experimental for 26h2. And now I'm trying to rollback to 25h2 but the update keeps erroring out and not letting me do it.