Insider KB5082257 Windows 11 Insider Dev build 26300.7966 (25H2) - March 11


UPDATE 3/13:


 Windows Insider Blog:

[UPDATE 3/11/26]: We are rolling out standalone Update Build 26300.7966 (KB5082257). This update does not include anything new and is designed to test our servicing pipeline for builds in the Dev Channel. A restart will be required; device build version will not change post update.

Hello Windows Insiders, today we are releasing Windows 11 Insider Preview Build 26300.7965 (KB5079385) to the Dev Channel.

Changes in Dev Channel builds and updates are documented in two buckets: new features, and improvements (including notable fixes) that are being gradually rolled out for Insiders who have turned on the toggle to get the latest updates as they are available (via Settings > Windows Update*) and then new features, and improvements (including notable fixes) rolling out to everyone in the Dev Channel. For more information, see the Reminders section at the bottom of this blog.


New features gradually being rolled out with toggle on*

[Administrator Protection]

Administrator protection is being re-enabled and aims to protect free floating admin rights for administrator users, allowing them to still perform all admin functions with just-in-time admin privileges. This feature is OFF by default and can be enabled via OMA-URI in Intune or via group policy.


Changes and Improvements gradually being rolled out with toggle on*

[Sharing]

Based on feedback we’re making some refinements to drag tray, using a smaller peek view to reduce accidental invocation and make it easier to dismiss when interacting near the top of the screen.


[File Explorer]

  • You can now use voice typing (Windows key plus H) when renaming files in File Explorer.

  • Removed white flash when launching new File Explorer windows or tabs when File Explorer was set to open to This PC. Also removed white flashes when resizing elements of File Explorer.
  • Improved reliability of unblocking files downloaded from the internet in order to preview them in File Explorer.

Reminders for Windows Insiders in the Dev Channel

  • Updates are based on Windows 11, version 25H2 via an enablement package (Build 26300.7965).
  • Many features 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.
  • For Windows Insiders who want to be the first to get features gradually rolled out to you, you can turn ON the toggle to get the latest updates as they are available via Settings > Windows Update*. Over time, we will increase the rollouts of features to everyone with the toggle turned on. Should you keep this toggle off, new features will gradually be rolled out to your PC over time once they are ready.
  • Features and experiences included in these builds may never get released as we try out different concepts and get feedback. Features may 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 may not be fully localized and localization will happen over time as features are finalized. As you see issues with localization in your language, please report those issues to us via Feedback Hub.
  • Check out Flight Hub for a complete look at what build is in which Insider channel.
Thanks,
Windows Insider Program Team


 Source:



Check Windows Updates


UUP Dump:

64-bit ISO download:

ARM64 ISO download:

 
Last edited:
This year windows sandbox work for insiders builds ?
Not work in this build !
 

My Computer

System One

  • OS
    Win11Pro Dev 25H2 26220.6972
    Computer type
    PC/Desktop
    Screen Resolution
    4k
    Browser
    Microsoft Edge Beta
    Antivirus
    Eset Smart Security Premium
[UPDATE 3/11/26]: We are rolling out standalone Update Build 26300.7966 (KB5082257). This update does not include anything new and is designed to test our servicing pipeline for builds in the Dev Channel. A restart will be required; device build version will not change post update.

KB5082257.webp
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    TerraMaster F8 SSD Plus NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Amazon Basics Wired Full Keyboard MD005
    Mouse
    Logitech MX Master 4
    Internet Speed
    2 Gbps Download and 100 Mbps Upload
    Browser
    Chrome and Edge
    Antivirus
    Microsoft Defender
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    CyberPower CP1500PFCLCD
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Surface Laptop 7 Copilot+ PC
    CPU
    Snapdragon X Elite (12 core) 3.42 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Monitor(s) Displays
    15" HDR
    Screen Resolution
    2496 x 1664
    Hard Drives
    1 TB SSD
    Internet Speed
    Wi-Fi 7 and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Microsoft Defender
Updating.
1773289116351.webp

It installed the update but did not change the Build#, it is still 26300.7965 not 26300.7966. 😵‍💫🤷‍♂️
Again, wrong information in the blog, like they did last week with Beta. 🤬
This update is not changing the Build# as stated in the blog updated on 3/11/2026.

1773289485317.webp

Edition Windows 11 Pro Insider Preview
Version 25H2
Installed on ‎2/‎2/‎2026
Evaluation expires on ‎8/‎11/‎2026 11:09 AM
OS build 26300.7965
Experience Windows Feature Experience Pack 1000.26100.343.0

1773289684879.webp

1773289711125.webp
 
Last edited:

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
Updating.
View attachment 165636

It installed the update but did not change the Build#, it is still 26300.7965 not 26300.7966. 😵‍💫🤷‍♂️
Again, wrong information in the blog, like they did last week with Beta. 🤬
This update is not changing the Build# as stated in the blog updated on 3/11/2026.

View attachment 165637

Edition Windows 11 Pro Insider Preview
Version 25H2
Installed on ‎2/‎2/‎2026
Evaluation expires on ‎8/‎11/‎2026 11:09 AM
OS build 26300.7965
Experience Windows Feature Experience Pack 1000.26100.343.0

View attachment 165638

View attachment 165639
Maybe it didn't install? Is in your history of updates?
 

My Computer

System One

  • OS
    Win 11 Insider Release Preview and Beta channels.
    Computer type
    Laptop
    Manufacturer/Model
    HP ENVY Bought: March 2017
    CPU
    i5 Core [email protected] (Unsupported for Win 11)
    Motherboard
    HP 81AD (U3E1)
    Memory
    12GB
    Graphics Card(s)
    Generic PnP Monitor (1920x1080@60Hz) Intel HD Graphics 620 (HP)
    Sound Card
    Conexant ISST audio
    Monitor(s) Displays
    Generic PnP Monitor
    Screen Resolution
    1536x864 pixels
    Hard Drives
    HGST HTS721010A9E630
    PSU
    Well...PSU you too!! What's this mean?
    Case
    HP ENVY SILVER
    Cooling
    A fan.
    Keyboard
    USA
    Mouse
    Logitec Anywhere 2
    Internet Speed
    Good enough for me! Fast!
    Browser
    Edge/Waterfox
    Antivirus
    Windows Defender
    Other Info
    No 'mo.
Snipaste_2026-03-12_08-10-22.webp
 

My Computers

System One System Two

  • OS
    Win 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    ASUS Vivobook
    CPU
    AMD Ryzen™ 7 7730U
    Motherboard
    M1605YA
    Memory
    24GB Dual-Channel DDR4 @ 1596MHz (22-22-22-52)
    Graphics Card(s)
    512MB ATI AMD Radeon Graphics (ASUStek Computer Inc)
    Monitor(s) Displays
    Generic PnP Monitor (1920x1200@60Hz) - P1 PLUS (1920x1080@59Hz)
    Screen Resolution
    1920 X 1200
    Hard Drives
    953GB Western Digital WD
    PSU
    45 Watts
    Mouse
    Lenovo Bluetooth.
    Internet Speed
    500 Mbps
    Browser
    Edge
    Antivirus
    Defender
  • Operating System
    Windows 11
    Computer type
    Laptop
    Manufacturer/Model
    ACER NITRO
    CPU
    AMD Ryzen 7 5800H / 3.2 GHz
    Motherboard
    CZ Scala_CAS (FP6)
    Memory
    32 GB DDR4 SDRAM 3200 MHz
    Graphics card(s)
    NVIDIA GeForce RTX 3060 6 GB GDDR6 SDRAM
    Sound Card
    Realtek Audio. NVIDIA High Definition Audio
    Monitor(s) Displays
    15.6" LED backlight 1920 x 1080 (Full HD) 144 Hz
    Screen Resolution
    1920 x 1080 (Full HD)
    Hard Drives
    Samsung 970 Evo Plus 2TB NVMe M.2
    PSU
    180 Watt, 19.5 V
    Mouse
    Lenovo Bluetooth
    Internet Speed
    500 Mbps
    Browser
    Edge
    Antivirus
    Defender
1773318046191.webp
 

My Computer

System One

  • OS
    Windows 11 Pro Insider Preview Dev
    Computer type
    PC/Desktop
    Manufacturer/Model
    To be filled by O.E.M.
    CPU
    AMD Ryzen™ 5 5600G with Radeon Graphics 3.90 GHz
    Motherboard
    MSI B450 GAMING PLUS MAX
    Memory
    16,0 GB
    Graphics Card(s)
    NVIDIA GeForce GT 720, NVIDIA compatible
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    BenQ GW2270 Color Profile.D6500
    Screen Resolution
    1920 x 1080
    Hard Drives
    Samsung SSD 850 EVO 250GB + CT1000BX500SSD1 + ST2000DM006-2DM164 + WDC WD5000AAKS-07TMA0 +WDC WD10EARX-00N0YB0
    PSU
    EVGA 600 W2, 80+ WHITE 600W, 3 Year Warranty, Power Supply 100-W2-0600-K2 (EU)
    Case
    RAIJINTEK Agos - mid tower - ATX
    Cooling
    Cooler Master Hyper 212 Evo heatsink + Fans: 2 front+1 back+1 up
    Keyboard
    Logitech Internet 350 Keyboard
    Mouse
    Logitech MX Revolution
    Internet Speed
    Download 159.29 Mbps - Upload 80.14 Mbps
    Browser
    Google Crome Dev
    Antivirus
    Microsoft Windows Security
1773318362041.webp
Edizione Windows 11 Pro Insider Anteprima
Versione 25H2
Data installazione: ‎28/‎01/‎2026
Dati di scadenza della valutazione ‎11/‎08/‎2026 20:09
Costruisci il sistema operativo 26300.7965
Esperienza Pacchetto di esperienze per funzionalità Windows 1000.26100.343.0
 

My Computer

System One

  • OS
    Windows 11 Pro Insider Preview Dev
    Computer type
    PC/Desktop
    Manufacturer/Model
    To be filled by O.E.M.
    CPU
    AMD Ryzen™ 5 5600G with Radeon Graphics 3.90 GHz
    Motherboard
    MSI B450 GAMING PLUS MAX
    Memory
    16,0 GB
    Graphics Card(s)
    NVIDIA GeForce GT 720, NVIDIA compatible
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    BenQ GW2270 Color Profile.D6500
    Screen Resolution
    1920 x 1080
    Hard Drives
    Samsung SSD 850 EVO 250GB + CT1000BX500SSD1 + ST2000DM006-2DM164 + WDC WD5000AAKS-07TMA0 +WDC WD10EARX-00N0YB0
    PSU
    EVGA 600 W2, 80+ WHITE 600W, 3 Year Warranty, Power Supply 100-W2-0600-K2 (EU)
    Case
    RAIJINTEK Agos - mid tower - ATX
    Cooling
    Cooler Master Hyper 212 Evo heatsink + Fans: 2 front+1 back+1 up
    Keyboard
    Logitech Internet 350 Keyboard
    Mouse
    Logitech MX Revolution
    Internet Speed
    Download 159.29 Mbps - Upload 80.14 Mbps
    Browser
    Google Crome Dev
    Antivirus
    Microsoft Windows Security

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    TerraMaster F8 SSD Plus NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Amazon Basics Wired Full Keyboard MD005
    Mouse
    Logitech MX Master 4
    Internet Speed
    2 Gbps Download and 100 Mbps Upload
    Browser
    Chrome and Edge
    Antivirus
    Microsoft Defender
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    CyberPower CP1500PFCLCD
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Surface Laptop 7 Copilot+ PC
    CPU
    Snapdragon X Elite (12 core) 3.42 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Monitor(s) Displays
    15" HDR
    Screen Resolution
    2496 x 1664
    Hard Drives
    1 TB SSD
    Internet Speed
    Wi-Fi 7 and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Microsoft Defender
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