Install 26H1

Installs the Windows Assessment and Deployment Kit version 10.1.28000.1 (Windows 11 26H1) and its required WinPE add-on.

Property	Value
Version	10.1.28000.1
Architecture	amd64 / arm64
Platform	Windows 11
ADK setup	https://go.microsoft.com/fwlink/?linkid=2337875
WinPE add-on setup	https://go.microsoft.com/fwlink/?linkid=2337681
Cache path	C:\ProgramData\OSDeployCore\software\Microsoft.WindowsADK_10.1.28000.1\

Download and install the Windows ADKMicrosoftLearn

The ADK and the WinPE add-on are two separate downloads and must be the same version. Both are installed when using Install-OSDeploySoftware. The MDT WinPE x86 MMC snap-in bugfix is applied automatically during installation.

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Install with OSDeploy

The OSDeploy module downloads both installers and runs them silently in sequence. Administrator rights are required.

Preview (no changes made):

Install-OSDeploySoftware -Name 'adk-26h1'

Install:

Install-OSDeploySoftware -Name 'adk-26h1' -Force

Download only (skip installation):

Install-OSDeploySoftware -Name 'adk-26h1' -DownloadOnly -Force

Installers are cached to C:\ProgramData\OSDeployCore\software\Microsoft.WindowsADK_10.1.28000.1\ and reused on subsequent runs.

Requires PowerShell 7.6 or later running as Administrator. curl.exe must be available in PATH (included with Windows 10 1803 and later). winget is not used for ADK installation.

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Manual Installation

To install the ADK manually, download both setup executables and run them silently.

Download ADK setup and WinPE add-on setup:

$DownloadPath = "$env:ProgramData\OSDeployCore\software\Microsoft.WindowsADK_10.1.28000.1"
New-Item -Path $DownloadPath -ItemType Directory -Force | Out-Null

curl.exe --location --output "$DownloadPath\adksetup.exe" --url 'https://go.microsoft.com/fwlink/?linkid=2337875'
curl.exe --location --output "$DownloadPath\adkwinpesetup.exe" --url 'https://go.microsoft.com/fwlink/?linkid=2337681'

Install Windows ADK:

Start-Process -FilePath "$DownloadPath\adksetup.exe" -ArgumentList '/quiet', '/norestart' -Wait

Install WinPE add-on:

Start-Process -FilePath "$DownloadPath\adkwinpesetup.exe" -ArgumentList '/quiet', '/norestart' -Wait

Apply MDT WinPE x86 bugfix (required for MDT integration):

$x86Path = 'C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Windows Preinstallation Environment\x86\WinPE_OCs'
if (-not (Test-Path $x86Path)) {
    New-Item -Path $x86Path -ItemType Directory -Force | Out-Null
}

Administrator rights are required for both setup steps.

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Related

• Windows ADK documentation

• What's new in kits and tools

• Install-OSDeploySoftware

• Install Windows ADK 25H2