Installation and Upgrade Download Official Windows 11 ISO file from Microsoft

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This tutorial will show you how to download an official Windows Server or Windows 11 64-bit or ARM64 ISO file from Microsoft.

Microsoft provides ISO files for Windows Server and Windows 11 to download. You can use these ISO files to clean install or in-place upgrade Windows 11.


The Flight Hub can also help you keep updated on which Windows 11 builds have an ISO available.



Contents

  • Option One: Download Latest Windows 11 64-bit ISO using Media Creation Tool (MCT)
  • Option Two: Download Windows 11 64-bit or ARM64 ISO from Microsoft
  • Option Three: Download Windows 11 Insider 64-bit ISO from Microsoft
  • Option Four: Download Windows Server Insider ISO from Microsoft
  • Option Five: Download Windows 11 64-bit or ARM64 ISO or Windows Server ISO from UUP Dump


See also:




Option One

Download Latest Windows 11 64-bit ISO using Media Creation Tool (MCT)


This will be for a Windows 11 Version 25H2 build 26200.8875 ISO file with install.esd.


1 Click/tap on the Download button below, and click/tap on the Download Now button at Microsoft's site for Create Windows 11 Installation Media. (see screenshot below)


Windows_11_MCT-1.png

2 Save the mediacreationtool.exe file version 10.0.26100.7019 to your desktop, and run it.

Windows_11_MCT-2.webp

3 If prompted by UAC, click/tap on Yes.

4 Click/tap on Accept for the license terms. (see screenshot below)

Windows_11_MCT-3.png

5 Uncheck the Use the recommended options for this PC box. (see screenshot below)

Leaving the Use the recommended options for this PC box checked will have the Media Creation Tool download an ISO that's the same language, edition, and architecture as the current PC.


Windows_11_MCT-4.png

6 Select the Language and Edition you want for the ISO file, and click/tap on Next. (see screenshot below)

The Windows 11 option includes both the Home and Pro editions. The product key you enter during installation (Windows Setup) is what determines which edition gets installed.

Your digital license or product key determines if Home or Pro gets installed during Windows Setup.

If you skip entering a product key during Windows Setup, then you will be prompted to select to install the Home or Pro edition.


Windows_11_MCT_x.png

7 Select (dot) ISO file, and click/tap on Next. (see screenshot below)

Windows_11_MCT-5.png

8 Select where you would like to save the ISO file to, type in a name you want for the ISO file, and click/tap on Save. (see screenshot below)

Windows_11_MCT-6.png

9 The Windows 11 ISO file will now begin to download. (see screenshot below)

Windows_11_MCT-7.png

10 When the download has finished, click/tap on the link where you selected to save the ISO file at to open that location, and click/tap on Finish. (see screenshot below)

Windows_11_MCT-8.png




Option Two

Download Windows 11 64-bit or ARM64 ISO from Microsoft


This will be for a Windows 11 Version 25H2 build 26200.8037 ISO file with install.wim.


1 Click/tap on the Download button below for the 64-bit or ARM64 ISO you want to download.

64-bit ISO

OR​

ARM64 ISO

2 Perform the appropriate action below for 64-bit or ARM64: (see screenshots below)
  • Select Windows 11 (multi-edition ISO for x64 devices) in the Download Windows 11 Disk Image (ISO) for x64 devices drop menu, and click/tap on Confirm
  • Select Windows 11 (multi-edition ISO for Arm64) in the drop menu, and click/tap on Download Now.
Download_W11_ISO-1.png
Windows11_ARM_ISO.png

3 Select the language (ex: "English") you want, and click/tap on Confirm. (see screenshot below)

Download_W11_ISO-2.png

4 Click/tap on the 64-bit Download or Download Now (ARM64) button. (see screenshots below)

Download_W11_ISO-3.png
Windows11_ARM_ISO-download_now.png

5 Navigate to and select where (ex: "Desktop") you want to save the ISO file, and click/tap on Save. (see screenshot below)

Download_W11_ISO-4.png




Option Three

Download Windows 11 Insider 64-bit ISO from Microsoft



1 Click/tap on the Download button below to go to the Windows Insider Preview Downloads site by Microsoft below,


2 Scroll down to the Select edtion section, and select the Windows 11 Insider Preview Canary, Dev, Beta, or Release Preview Channel ISO for the build number you want, and click/tap on Confirm. (see screenshots below)

ISO_download.webp
confirm.png

3 Select the language (ex: "English") you want, and click/tap on Confirm. (see screenshot below)

language.png

4 Click/tap on the 64-bit Download button. (see screenshot below)

Download.png

5 Navigate to and select where (ex: "Desktop") you want to save the ISO file, and click/tap on Save. (see screenshot below)

Save.png




Option Four

Download Windows Server Insider ISO from Microsoft


1 Click/tap on the Download button below to go to the Windows Insider Preview Downloads site by Microsoft below,


2 Select the Windows Server VNext Preview ISO for the build number you want, and click/tap on Confirm. (see screenshots below)

W11_Server_Insider-1.webp
W11_Server_Insider-2.png

3 Select the language (ex: "English") you want, and click/tap on Confirm. (see screenshot below)

W11_Server_Insider-3.png

4 Click/tap on the Download Now button. (see screenshot below)

W11_Server_Insider-4.png

5 Navigate to and select where (ex: "Desktop") you want to save the ISO file, and click/tap on Save. (see screenshot below)

W11_Server_Insider-5.png




Option Five

Download Windows 11 64-bit or ARM64 ISO or Windows Server ISO from UUP Dump


You can download an ISO for public and Insider builds using this option.


1 Using the tutorial below, search for and select the Windows version and build ISO you want to download.



That's it,
Shawn Brink


 
Last edited:
Here's an improved version of my script:
1. If your drive is a Removable device, \sources\boot.wim is updated in place. You don't have to copy files around.

2. If your drive is a Read-Only device (like a mounted ISO file), an updated boot.wim is created in the same folder as the script. When the script is done, copy this boot.wim to your USB device.
Thanks again,
this worked, I tried with Microsoft Build 29617.1000 on a USB installation media.
Boot.wim was updated in place. "Repair my PC" worked fine after the update. 👍
According to Copilot there are more than just those 2 .dll files missing. If I compare the size of boot.wim of the Microsoft official ISO and the one built from UUP dump there are many more files missing.

1784870027266.webp


People who diffed the two boot.wims found missing folders and packages such as:

  • Windows\System32\drivers\* (several networking and storage drivers)
  • Windows\System32\en-US\* (localization resources)
  • Windows\System32\WinPE-StorageWMI.dll
  • Windows\System32\WinPE-Scripting.dll
  • Windows\System32\WinPE-WMI.dll
  • Windows\System32\WinPE-SecureStartup.dll
  • Windows\System32\WinPE-Fonts\*
  • Windows\System32\WinPE-Rejuv\* (the modern recovery UI)
  • Windows\System32\Recovery\* (extra UI assets)
  • Windows\System32\drivers\USB\* (some USB class drivers)
  • Windows\System32\drivers\NetAdapterCx.sys
  • Windows\System32\drivers\WDI\*
 
Last edited:

My Computer My Computer

At a glance

Windows 11 Pro 25H2Intel I9-9900K64GBNVIDIA RTX 2060
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
abbodi mentioned you only need the two files to make "Repair My PC" work.

1. WinRE is actually an extended version of the base WinPE image. Most of the missing features can be integrated as Optional Components (OC's) using the Windows ADK PE Add-on's, with the exception of WinPE-Rejuv.

WinPE-Rejuv feature is only provided in the base WinRE image.

2. A properly installed WinRE will inherit all of the live system's 3rd-party drivers for networking and storage.
 

My Computer My Computer

At a glance

Windows 7
OS
Windows 7
Today; I think it's time that MS releases v3 official and complete .ISO. With 26200.8655 they made some changes to the CBS-engine. When you install v2 (8037) you can't pass 8655. That has to be installed first. After that it updates itself to the latest level.

About the MCT version. Found out that the build version is a in-between version. That build does not exist in the normal official releases.
I download a MCT version. And it's build was 26200.8653. Updating to 8655 it ignored because the versions are so close together. An other MCT download I've got yet again a in-between build; 26200.8873 while the official update was 8875. If an update also ignores 8875 is unknown. I did not tried that.

It's odd. Two MCT build versions; 8653 and 8873. The official update range only knows 8524, 8655, 8737, 8875 and 8894.
Maybe it has to do with the release date. 8873 was made on 10-07-2026 while the official 8875 release was 14-07-2026. I think wait a couple of day and generate a MCT build on or after 14-07-2026.

I installed MCT build 8653 as a new installation. It tried to update my system. It ignored 8655. It saw then the next update 8737 and updated the system.

Today I downloaded both types; The MCT version and the official Win11 ISO's in both languages; Dutch (my language) and English (US). I found the following information inside each .ISO: See attachment.
 

Attachments

My Computers My Computers

  • At a glance

    Win 11 Pro 25H2 Build 26200.8973, Zorin OS ProIntel® Core™ i7-12700KF 12th Gen. (S1700)32GB DDR5 5600-36 Vengeance (2x16)PCIe4.0 Asus NVIDIA RTX3060Ti
    OS
    Win 11 Pro 25H2 Build 26200.8973, Zorin OS Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self built
    CPU
    Intel® Core™ i7-12700KF 12th Gen. (S1700)
    Motherboard
    ASUS Prime Z690-A, BIOS v4505 (Z690 Intel Chipset)
    Memory
    32GB DDR5 5600-36 Vengeance (2x16)
    Graphics Card(s)
    PCIe4.0 Asus NVIDIA RTX3060Ti
    Sound Card
    Onboard; Realtek
    Monitor(s) Displays
    34" LG 34UC79G-B Curved 21:9 144Hz
    Screen Resolution
    2560x1080 (No HDR)
    Hard Drives
    250Gb Samsung 870PRO NVMe (Win 11 Pro)
    1Tb Samsung 980PRO NVMe
    1Tb Samsung 970EVO NVMe
    2Tb Samsung 990PRO NVMe with heatsink.
    4Tb WDC WD40EZRZ Blue SATA (Int.)
    4Tb WDC WD40EZRZ Blue SATA (Int.)
    3Tb WDC WD30EFRZ Red SATA (Int.)
    256Gb Samsung 840PRO SSD (RHEL 9,5)
    256Gb Samsung 850PRO SSD (Zorin OS Pro 18)
    PSU
    Coolermaster 850W V2 Gold with internal 12cm exaust fan
    Case
    Be-Quiet Pure Base 600.
    Cooling
    3x Be-Quiet! 12/14cm "Silent Wings 4" casefans, 1x Arctic Freezer i35 CPU towerblock with fan.
    Keyboard
    Steelseries APEX 7 keyboard.
    Mouse
    Logitech G-502 Hero
    Internet Speed
    1Gb
    Browser
    Brave
    Antivirus
    F-Secure
    Other Info
    No Noise system.
    256Gb Kingston Travler USB 3.0 drive.
    64Gb Sandisk USB 3.2 drive. (Ventoy)
    8Gb Philips USB 3.0 drive. (Win. Inst.)
    8Gb Philips USB 3.0 drive. (Rescue disk)
    2Tb WD USB 3.0 Passport drive.
    USB Ext. 500Gb WD SATA drive.
    External USB 3.0 C.A. CD/DVD* burner.
  • At a glance

    Windows 11 Pro 25H2Intel® Core™ i7-6700K 6th Gen. (S1151)32Gb DDR4 2400 Corsair Vengeance (4x8)ASUS GeForce GTX1080
    Operating System
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Selfbuild
    CPU
    Intel® Core™ i7-6700K 6th Gen. (S1151)
    Motherboard
    ASUS Maximus VIII Ranger (Intel Chipset Z170)
    Memory
    32Gb DDR4 2400 Corsair Vengeance (4x8)
    Graphics card(s)
    ASUS GeForce GTX1080
    Sound Card
    Onboard; Realtek
    Monitor(s) Displays
    LG IPS277L 27" WideLED, IPS
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung 850 Pro SSD
    PSU
    Zalman ZM600-HP with internal exhaust fan. Heatpipes & Modular cables.
    Case
    Cooler Master Aero
    Cooling
    Scythe Mugen 4 dual fan towerblock.
    Keyboard
    Red Dragon
    Mouse
    Red Dragon
    Internet Speed
    1Gb
    Browser
    Chrome
    Antivirus
    F-Secure
abbodi mentioned you only need the two files to make "Repair My PC" work.

1. WinRE is actually an extended version of the base WinPE image. Most of the missing features can be integrated as Optional Components (OC's) using the Windows ADK PE Add-on's, with the exception of WinPE-Rejuv.

WinPE-Rejuv feature is only provided in the base WinRE image.

2. A properly installed WinRE will inherit all of the live system's 3rd-party drivers for networking and storage.
Yes, it opens the recovery menus, but who knows what other recovery functions are missing? 😵‍💫🤷‍♂️
I hope Microsoft puts out an official fix.
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2Intel I9-9900K64GBNVIDIA RTX 2060
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
Windows 11 version 25H2 build 26200.8875 now available to download as ISO or USB with MCT.



ISO.webp
 

My Computers My Computers

  • At a glance

    Windows 11 Pro for WorkstationsIntel i7-8700K 5 GHz64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600...ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GD...
    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
  • At a glance

    Windows 11 ProSnapdragon X Elite (12 core) 3.42 GHz16 GB LPDDR5x-7467 MHz
    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
Windows 11 version 25H2 build 26200.8875 now available to download as ISO or USB with MCT.



View attachment 177884
Like the previous MCT this one still fails to show the recovery menus, when you hit "Repair my PC" it reboots to the main OS and never shows any recovery menus. 😝🤬🤷‍♂️

I still have to use the one created from UUP dump to get "Repair my PC" to work. 🤞

 
Last edited:

My Computer My Computer

At a glance

Windows 11 Pro 25H2Intel I9-9900K64GBNVIDIA RTX 2060
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
What worked for us...

Ran MCT and created a bootable USB.

Ran garlin's script .\Update_UEFI-CA2023.ps1 -BootMedia

Ran copy C:\Windows\System32\mobilenetworking.dll C:\Users\<User Name>\AppData\Local\Temp

Ran copy C:\Windows\System32\wlanapi.dll C:\Users\<User Name\AppData\Local\Temp

Ran powershell -ep bypass -f C:\Users\<User Name>\Downloads\Repair_My_BootWIM.ps1 E: (my USB drive letter)

Booted from the USB, and selected Repair. Loaded correctly with no reboot.

I ran a few of the Repair functions with no issues.
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2
OS
Windows 11 Pro 25H2
Computer type
Laptop
Manufacturer/Model
Toshiba
What worked for us...

Ran MCT and created a bootable USB.

Ran garlin's script .\Update_UEFI-CA2023.ps1 -BootMedia

Ran copy C:\Windows\System32\mobilenetworking.dll C:\Users\<User Name>\AppData\Local\Temp

Ran copy C:\Windows\System32\wlanapi.dll C:\Users\<User Name\AppData\Local\Temp

Ran powershell -ep bypass -f C:\Users\<User Name>\Downloads\Repair_My_BootWIM.ps1 E: (my USB drive letter)

Booted from the USB, and selected Repair. Loaded correctly with no reboot.

I ran a few of the Repair functions with no issues.
Some extra steps to work around the bug. 😵‍💫🤬🤷‍♂️
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2Intel I9-9900K64GBNVIDIA RTX 2060
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
Ran MCT and created a bootable USB.

Ran garlin's script .\Update_UEFI-CA2023.ps1 -BootMedia
This step only replaces the boot file on the USB. But nothing else from the boot.wim or install WIM/ESD contents. So your USB is bootable from UEFI.

Ran copy C:\Windows\System32\mobilenetworking.dll C:\Users\<User Name>\AppData\Local\Temp

Ran copy C:\Windows\System32\wlanapi.dll C:\Users\<User Name\AppData\Local\Temp
Don't have to perform these extra steps.

Ran powershell -ep bypass -f C:\Users\<User Name>\Downloads\Repair_My_BootWIM.ps1 E: (my USB drive letter)
This script repairs the "Repair My PC" feature by grabbing the two previous files from the install WIM/ESD and transplanting them to your boot.wim. It will always extract the two DLL's as needed, so you don't have to worry about finding the files yourself.

Booted from the USB, and selected Repair. Loaded correctly with no reboot.

I ran a few of the Repair functions with no issues.
Scripts worked as they were designed. :hug:
 

My Computer My Computer

At a glance

Windows 7
OS
Windows 7
This script repairs the "Repair My PC" feature by grabbing the two previous files from the install WIM/ESD and transplanting them to your boot.wim. It will always extract the two DLL's as needed, so you don't have to worry about finding the files yourself.
Actually, they didn't extract, and threw errors in the script.
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2
OS
Windows 11 Pro 25H2
Computer type
Laptop
Manufacturer/Model
Toshiba

My Computer My Computer

At a glance

Windows 11 Pro 25H2
OS
Windows 11 Pro 25H2
Computer type
Laptop
Manufacturer/Model
Toshiba
This step only replaces the boot file on the USB. But nothing else from the boot.wim or install WIM/ESD contents. So your USB is bootable from UEFI.


Don't have to perform these extra steps.


This script repairs the "Repair My PC" feature by grabbing the two previous files from the install WIM/ESD and transplanting them to your boot.wim. It will always extract the two DLL's as needed, so you don't have to worry about finding the files yourself.


Scripts worked as they were designed. :hug:
I want to see how long it will take Microsoft before they fix this mess.
I just use the ones I created from UUP dump, they still work correctly. 🤞
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2Intel I9-9900K64GBNVIDIA RTX 2060
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
OK. I think there's a race condition where one imagex doesn't finish before another one is called. Try this version (it adds a short delay).
 

Attachments

My Computer My Computer

At a glance

Windows 7
OS
Windows 7
Try this version (it adds a short delay).
Unfortunately, it did not work.


Microsoft Windows [Version 10.0.26200.8875]
(c) Microsoft Corporation. All rights reserved.

C:\Users\Jim>cd downloads

C:\Users\Jim\Downloads>powershell -ep bypass -f C:\Users\Jim\Downloads\Repair_My_BootWIM.ps1 E:
Updating boot WIM on E:

[ERROR] blob could not be assigned to a solid resource
ERROR: Exiting with error code 20:
An entry in the WIM's lookup table is invalid.
Scanning "C:\Users\Jim\AppData\Local\Temp\wlanapi.dll" (loading as WIM path: "\Windows\System32\wlanapi.dll")...
[ERROR] Can't open "C:\Users\Jim\AppData\Local\Temp\wlanapi.dll" (status=c0000034): Object Name notfound
ERROR: Exiting with error code 47:
Failed to open a file.

Performing clean-up on boot WIM.

"E:\sources\boot.wim" original size: 592488 KiB
Using LZX compression with 4 threads
Archiving file data: 1349 MiB of 1349 MiB (100%) done
"E:\sources\boot.wim" optimized size: 590390 KiB
Space saved: 2098 KiB
Remove-Item : Cannot find path 'C:\Users\Jim\AppData\Local\Temp\wlanapi.dll' because it does not
exist.
At C:\Users\Jim\Downloads\Repair_My_BootWIM.ps1:106 char:5
+ Remove-Item "$TEMP_DIR\wlanapi.dll","$TEMP_DIR\mobilenetworking.d ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (C:\Users\Jim\Ap...emp\wlanapi.dll:String) [Remove-I
tem], ItemNotFoundException
+ FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.RemoveItemCommand

Remove-Item : Cannot find path 'C:\Users\Jim\AppData\Local\Temp\mobilenetworking.dll' because it
does not exist.
At C:\Users\Jim\Downloads\Repair_My_BootWIM.ps1:106 char:5
+ Remove-Item "$TEMP_DIR\wlanapi.dll","$TEMP_DIR\mobilenetworking.d ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (C:\Users\Jim\Ap...enetworking.dll:String) [Remove-I
tem], ItemNotFoundException
+ FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.RemoveItemCommand

C:\Users\Jim\Downloads>


The only way it did was after I manually copied those two DLLs from System32 to AppData\Local\Temp...

Microsoft Windows [Version 10.0.26200.8875]
(c) Microsoft Corporation. All rights reserved.

C:\Users\Jim>cd downloads

C:\Users\Jim\Downloads>powershell -ep bypass -f C:\Users\Jim\Downloads\Repair_My_BootWIM.ps1 E:
Updating boot WIM on E:

[ERROR] blob could not be assigned to a solid resource
ERROR: Exiting with error code 20:
An entry in the WIM's lookup table is invalid.
Scanning "C:\Users\Jim\AppData\Local\Temp\wlanapi.dll" (loading as WIM path: "\Windows\System32\wlanapi.dll")...
578 KiB scanned (1 files, 0 directories)
Scanning "C:\Users\Jim\AppData\Local\Temp\mobilenetworking.dll" (loading as WIM path: "\Windows\System32\mobilenetworking.dll")...
136 KiB scanned (1 files, 0 directories)
Using LZX compression with 1 thread
Archiving file data: 714 KiB of 714 KiB (100%) done

Performing clean-up on boot WIM.

"E:\sources\boot.wim" original size: 594543 KiB
Using LZX compression with 4 threads
Archiving file data: 1350 MiB of 1350 MiB (100%) done
"E:\sources\boot.wim" optimized size: 590658 KiB
Space saved: 3884 KiB

C:\Users\Jim\Downloads>

Additionally, Windows can't open wimlib-bin.zip.

I was able to extract the contents with 7-Zip.

Looks like it just contains some licensing and readme files, but if you're trying to extract anything critical anywhere else, it could be a problem.
 
Last edited:

My Computer My Computer

At a glance

Windows 11 Pro 25H2
OS
Windows 11 Pro 25H2
Computer type
Laptop
Manufacturer/Model
Toshiba
Its sounds like either there's a security problem, where wimlib-imagex is being blocked.

Here's the script's flow in a nutshell:
1. Check if your AppData\Local\Temp has an existing copy of wimlib-imagex.exe. If not, download it from the website and extract the EXE and one DLL to AppLocal\Temp.
2. Run wimlib-imagex to extract the two DLL's from your install WIM/ESD to AppData\Local\Temp.
3. Run wimlib-imagex to append those two files to the boot.wim.
4. Run wimlin-imagex to clean up (garbage collect) boot.wim.

What I would do is delete these files (as Administrator) from your AppData\Local\Temp:

wimlib-1.14.5-windows-x86_64-bin.zip
wimlib-imagex.exe
libwim-15.dll
wlanapi.dll
mobilenetworking.dll
 

My Computer My Computer

At a glance

Windows 7
OS
Windows 7
Check if your AppData\Local\Temp has an existing copy of wimlib-imagex.exe

It does, after the script errors out....along with libwim-15.dll

That's it.

The permissions seem correct. (SYSTEM, myself, Administrators have full permissions...owner is Administrators)

I'll need to read up on wimlib-imagex.exe...have not used it.
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2
OS
Windows 11 Pro 25H2
Computer type
Laptop
Manufacturer/Model
Toshiba
wimlib is kinda like a 7-ZIP for WIM files. It avoids having to mount and unmount WIM's just to do anything, which is a huge improvement in speed and not taking up so much disk space.
 

My Computer My Computer

At a glance

Windows 7
OS
Windows 7
This sort of indicates (to me, anyway) a problem with the original boot.wim that MCT wrote to the USB flash drive...

[ERROR] blob could not be assigned to a solid resource
ERROR: Exiting with error code 20:
An entry in the WIM's lookup table is invalid.


I built a new bootable USB with MCT again this morning...I copied boot.wim to my hard drive, and use that to copy it back to \sources before each test run.

I dunno...may not be permissions at all. Everything else works correctly when it has those two DLLs in AppData\Local\Temp
 

My Computer My Computer

At a glance

Windows 11 Pro 25H2
OS
Windows 11 Pro 25H2
Computer type
Laptop
Manufacturer/Model
Toshiba

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