Follow-up on downloading Windows Assessment and Deployment Kit (Windows ADK) 8.1 (September 2014)

There’s a new release of the Windows Assessment and Deployment Kit (Windows ADK) 8.1 this month.
I’ve seen a blog post from Johan Arwidmark about this new release:

I just came back from holidays and have prepared the updated code before my holidays but hadn’t time to blog about it 😐

What did I change in the code? Not many things.
I’ve removed duplicate entries in the here-strings and I’m now using a $PatchLevel variable to keep track of the current version.

#Requires -Version 4
#Requires -RunAsAdministrator 
Function Get-ADKFiles {
Begin {
    $HT = @{}
    $HT += @{ ErrorAction = 'Stop'}
    # Validate target folder
    try {
        Get-Item $TargetFolder @HT | Out-Null
    } catch {
        Write-Warning -Message "The target folder specified as parameter does not exist"

    # April 2014: 8.100.26629
    $PatchLevel = "8.100.26866"

Process {
    $adkGenericURL = (Invoke-WebRequest -Uri -MaximumRedirection 0 -ErrorAction SilentlyContinue)
    # 302 = redirect as moved temporarily
    if ($adkGenericURL.StatusCode -eq 302) {
        # Currently set to
        $MainURL = $adkGenericURL.Headers.Location
        $InstallerURLs = DATA {
            ConvertFrom-StringData @'
                86=Application Compatibility Toolkit-x64_en-us.msi
                87=Application Compatibility Toolkit-x86_en-us.msi
                88=Assessments on Client-x86_en-us.msi
                89=Assessments on Server-x86_en-us.msi
                125=Kits Configuration Installer-x86_en-us.msi
                126=Microsoft Compatibility Monitor-x86_en-us.msi
                128=Toolkit Documentation-x86_en-us.msi
                129=User State Migration Tool-x86_en-us.msi
                130=Volume Activation Management Tool-x86_en-us.msi
                135=Windows Assessment Services - Client (AMD64 Architecture Specific, Client SKU)-x86_en-us.msi
                136=Windows Assessment Services - Client (AMD64 Architecture Specific, Server SKU)-x86_en-us.msi
                137=Windows Assessment Services - Client (Client SKU)-x86_en-us.msi
                138=Windows Assessment Services - Client (Server SKU)-x86_en-us.msi
                139=Windows Assessment Services - Client (X86 Architecture Specific, Client SKU)-x86_en-us.msi
                140=Windows Assessment Services-x86_en-us.msi
                141=Windows Assessment Toolkit (AMD64 Architecture Specific)-x86_en-us.msi
                142=Windows Assessment Toolkit (X86 Architecture Specific)-x86_en-us.msi
                143=Windows Assessment Toolkit-x86_en-us.msi
                144=Windows Deployment Customizations-x86_en-us.msi
                145=Windows Deployment Tools-x86_en-us.msi
                146=Windows PE x86 x64 wims-x86_en-us.msi
                147=Windows PE x86 x64-x86_en-us.msi
                148=Windows System Image Manager on amd64-x86_en-us.msi
                149=Windows System Image Manager on x86-x86_en-us.msi
                150=WPT Redistributables-x86_en-us.msi
        $PatchesURLs = DATA {
            ConvertFrom-StringData @'
                0=Toolkit Documentation-x86_en-us.msp
                1=Application Compatibility Toolkit-x86_en-us.msp
                2=Application Compatibility Toolkit-x64_en-us.msp
                3=Windows Deployment Tools-x86_en-us.msp
                4=Windows System Image Manager on amd64-x86_en-us.msp
                5=Windows System Image Manager on x86-x86_en-us.msp
                6=Windows PE x86 x64-x86_en-us.msp
                7=User State Migration Tool-x86_en-us.msp
                8=Volume Activation Management Tool-x86_en-us.msp
                11=WPT Redistributables-x86_en-us.msp
                12=Windows Assessment Toolkit-x86_en-us.msp
                13=Assessments on Client-x86_en-us.msp
                14=Windows Assessment Services-x86_en-us.msp
                15=Windows Assessment Services - Client (Server SKU)-x86_en-us.msp
                16=Assessments on Server-x86_en-us.msp
                17=Windows Assessment Services - Client (Client SKU)-x86_en-us.msp
        "Installers","Patches\$PatchLevel" | ForEach-Object -Process {
            # Create target folders if required as BIT doesn't accept missing folders
            If (-not(Test-Path (Join-Path -Path $TargetFolder -ChildPath $_))) {
                try {
                    New-Item -Path (Join-Path -Path $TargetFolder -ChildPath $_) -ItemType Directory -Force @HT
                } catch {
                    Write-Warning -Message "Failed to create folder $($TargetFolder)/$_"
        # Get adksetup.exe
        Invoke-WebRequest -Uri "$($MainURL)adksetup.exe" -OutFile  "$($TargetFolder)\adksetup.exe"
        # Create a job that will downlad our first file
        $job = Start-BitsTransfer -Suspended -Source "$($MainURL)Installers/$($InstallerURLs['0'])" -Asynchronous -Destination (Join-Path -Path $TargetFolder -ChildPath ("Installers/$($InstallerURLs['0'])")) 
        # Downlod installers
        For ($i = 1 ; $i -lt $InstallerURLs.Count ; $i++) {
            $URL = $Destination = $null
            $URL = "$($MainURL)Installers/$($InstallerURLs[$i.ToString()])"
            $Destination = Join-Path -Path (Join-Path -Path $TargetFolder -ChildPath Installers) -ChildPath (([URI]$URL).Segments[-1] -replace '%20'," ")
            # Add-BitsFile
            $newjob = Add-BitsFile -BitsJob $job -Source  $URL -Destination $Destination
            Write-Progress -Activity "Adding file $($newjob.FilesTotal)" -Status "Percent completed: " -PercentComplete (($newjob.FilesTotal)*100/($InstallerURLs.Count))
        # Donwload Patches
        For ($i = 0 ; $i -lt $PatchesURLs.Count ; $i++) {
            $URL = $Destination = $null
            $URL = "$($MainURL)Patches/$PatchLevel/$($PatchesURLs[$i.ToString()])"
            $Destination = Join-Path -Path (Join-Path -Path $TargetFolder -ChildPath "Patches/$PatchLevel") -ChildPath (([URI]$URL).Segments[-1] -replace '%20'," ")
            # Add-BitsFile
            $newjob = Add-BitsFile -BitsJob $job -Source  $URL -Destination $Destination
        # Begin the download and show us the job
        Resume-BitsTransfer  -BitsJob $job -Asynchronous
        while ($job.JobState -in @('Connecting','Transferring','Queued')) {
            Write-Progress -activity "Downloading ADK files" -Status "Percent completed: " -PercentComplete ($job.BytesTransferred*100/$job.BytesTotal)
        Switch($job.JobState) {
         "Transferred" {
            Complete-BitsTransfer -BitsJob $job
         "Error" {
            # List the errors.
            $job | Format-List
        default {
            # Perform corrective action.
End {}