function Invoke-WinUtilISOScript {
    <#
    .SYNOPSIS
        Applies WinUtil modifications to a mounted Windows 11 install.wim image.

    .DESCRIPTION
        Removes AppX bloatware and OneDrive, optionally injects all drivers exported from
        the running system into install.wim and boot.wim (controlled by the
        -InjectCurrentSystemDrivers switch), applies offline registry tweaks (hardware
        bypass, privacy, OOBE, telemetry, update suppression), deletes CEIP/WU
        scheduled-task definition files, and optionally writes autounattend.xml to the ISO
        root and removes the support\ folder from the ISO contents directory.

        All setup scripts embedded in the autounattend.xml <Extensions><File> nodes
        (Specialize.ps1, DefaultUser.ps1, FirstLogon.ps1, UserOnce.ps1, etc.) are written
        directly into the WIM at their target paths under C:\Windows\Setup\Scripts\.  This
        pre-staging is necessary because Windows Setup strips unrecognised-namespace XML
        elements — including the Schneegans <Extensions> block — when copying the answer
        file to %WINDIR%\Panther\unattend.xml.  Without pre-staging the [scriptblock] that
        tries to extract scripts from the Panther copy receives $null, no scripts reach
        disk, and both the specialize-pass actions and FirstLogonCommands silently fail.

        Mounting/dismounting the WIM is the caller's responsibility (e.g. Invoke-WinUtilISO).

    .PARAMETER ScratchDir
        Mandatory. Full path to the directory where the Windows image is currently mounted.
        Example: C:\Users\USERNAME\AppData\Local\Temp\WinUtil_Win11ISO_20260222\wim_mount

    .PARAMETER ISOContentsDir
        Optional. Root directory of the extracted ISO contents.
        When supplied, autounattend.xml is also written here so Windows Setup picks it
        up automatically at boot, and the support\ folder is deleted from that location.

    .PARAMETER AutoUnattendXml
        Optional. Full XML content for autounattend.xml.
        In compiled winutil.ps1 this is the embedded $WinUtilAutounattendXml here-string;
        in dev mode it is read from tools\autounattend.xml.
        If empty, the OOBE bypass file is skipped and a warning is logged.

    .PARAMETER InjectCurrentSystemDrivers
        Optional. When $true, exports all drivers from the running system and injects
        them into install.wim and boot.wim index 2 (Windows Setup PE).
        Defaults to $false — no drivers are injected.

    .PARAMETER Log
        Optional ScriptBlock used for progress/status logging.
        Receives a single [string] message argument.
        Defaults to { param($m) Write-Output $m } when not supplied.

    .EXAMPLE
        Invoke-WinUtilISOScript -ScratchDir "C:\Temp\wim_mount"

    .EXAMPLE
        Invoke-WinUtilISOScript `
            -ScratchDir      $mountDir `
            -ISOContentsDir  $isoRoot `
            -AutoUnattendXml (Get-Content .\tools\autounattend.xml -Raw) `
            -Log             { param($m) Write-Host $m }

    .NOTES
        Author  : Chris Titus @christitustech
        GitHub  : https://github.com/ChrisTitusTech
        Version : 26.03.02
    #>
    param (
        [Parameter(Mandatory)][string]$ScratchDir,
        [string]$ISOContentsDir = "",
        [string]$AutoUnattendXml = "",
        [bool]$InjectCurrentSystemDrivers = $false,
        [scriptblock]$Log = { param($m) Write-Output $m }
    )

    # ── Resolve admin group name (for takeown / icacls) ──────────────────────
    $adminSID   = New-Object System.Security.Principal.SecurityIdentifier('S-1-5-32-544')
    $adminGroup = $adminSID.Translate([System.Security.Principal.NTAccount])

    # ── Local helpers ─────────────────────────────────────────────────────────
    function Set-ISOScriptReg {
        param ([string]$path, [string]$name, [string]$type, [string]$value)
        try {
            & reg add $path /v $name /t $type /d $value /f
            & $Log "Set registry value: $path\$name"
        } catch {
            & $Log "Error setting registry value: $_"
        }
    }

    function Remove-ISOScriptReg {
        param ([string]$path)
        try {
            & reg delete $path /f
            & $Log "Removed registry key: $path"
        } catch {
            & $Log "Error removing registry key: $_"
        }
    }

    # Injects all drivers from $DriverDir into a DISM-mounted image in one call.
    function Add-DriversToImage {
        param (
            [string]$MountPath,
            [string]$DriverDir,
            [string]$Label = "image",
            [scriptblock]$Logger
        )
        & dism /English "/image:$MountPath" /Add-Driver "/Driver:$DriverDir" /Recurse 2>&1 |
            ForEach-Object { & $Logger "  dism[$Label]: $_" }
    }

    # Mounts boot.wim index 2, injects all drivers from $DriverDir, saves, dismounts.
    function Invoke-BootWimInject {
        param (
            [string]$BootWimPath,
            [string]$DriverDir,
            [scriptblock]$Logger
        )
        Set-ItemProperty -Path $BootWimPath -Name IsReadOnly -Value $false -ErrorAction SilentlyContinue
        $mountDir = Join-Path $env:TEMP "WinUtil_BootMount_$(Get-Random)"
        New-Item -Path $mountDir -ItemType Directory -Force | Out-Null
        try {
            & $Logger "Mounting boot.wim (index 2 — Windows Setup) for driver injection..."
            Mount-WindowsImage -ImagePath $BootWimPath -Index 2 -Path $mountDir -ErrorAction Stop | Out-Null
            Add-DriversToImage -MountPath $mountDir -DriverDir $DriverDir -Label "boot" -Logger $Logger
            & $Logger "Saving boot.wim..."
            Dismount-WindowsImage -Path $mountDir -Save -ErrorAction Stop | Out-Null
            & $Logger "boot.wim driver injection complete."
        } catch {
            & $Logger "Warning: boot.wim driver injection failed: $_"
            try { Dismount-WindowsImage -Path $mountDir -Discard -ErrorAction SilentlyContinue | Out-Null } catch {}
        } finally {
            Remove-Item -Path $mountDir -Recurse -Force -ErrorAction SilentlyContinue
        }
    }

    # ═════════════════════════════════════════════════════════════════════════
    #  1. Remove provisioned AppX packages
    # ═════════════════════════════════════════════════════════════════════════
    & $Log "Removing provisioned AppX packages..."

    $packages = & dism /English "/image:$ScratchDir" /Get-ProvisionedAppxPackages |
        ForEach-Object {
            if ($_ -match 'PackageName : (.*)') { $matches[1] }
        }

    $packagePrefixes = @(
        'AppUp.IntelManagementandSecurityStatus',
        'Clipchamp.Clipchamp',
        'DolbyLaboratories.DolbyAccess',
        'DolbyLaboratories.DolbyDigitalPlusDecoderOEM',
        'Microsoft.BingNews',
        'Microsoft.BingSearch',
        'Microsoft.BingWeather',
        'Microsoft.Copilot',
        'Microsoft.Windows.CrossDevice',
        'Microsoft.GetHelp',
        'Microsoft.Getstarted',
        'Microsoft.Microsoft3DViewer',
        'Microsoft.MicrosoftOfficeHub',
        'Microsoft.MicrosoftSolitaireCollection',
        'Microsoft.MicrosoftStickyNotes',
        'Microsoft.MixedReality.Portal',
        'Microsoft.MSPaint',
        'Microsoft.Office.OneNote',
        'Microsoft.OfficePushNotificationUtility',
        'Microsoft.OutlookForWindows',
        'Microsoft.Paint',
        'Microsoft.People',
        'Microsoft.PowerAutomateDesktop',
        'Microsoft.SkypeApp',
        'Microsoft.StartExperiencesApp',
        'Microsoft.Todos',
        'Microsoft.Wallet',
        'Microsoft.Windows.DevHome',
        'Microsoft.Windows.Copilot',
        'Microsoft.Windows.Teams',
        'Microsoft.WindowsAlarms',
        'Microsoft.WindowsCamera',
        'microsoft.windowscommunicationsapps',
        'Microsoft.WindowsFeedbackHub',
        'Microsoft.WindowsMaps',
        'Microsoft.WindowsSoundRecorder',
        'Microsoft.ZuneMusic',
        'Microsoft.ZuneVideo',
        'MicrosoftCorporationII.MicrosoftFamily',
        'MicrosoftCorporationII.QuickAssist',
        'MSTeams',
        'MicrosoftTeams'
    )

    $packagesToRemove = $packages | Where-Object {
        $pkg = $_
        $packagePrefixes | Where-Object { $pkg -like "*$_*" }
    }
    foreach ($package in $packagesToRemove) {
        & dism /English "/image:$ScratchDir" /Remove-ProvisionedAppxPackage "/PackageName:$package"
    }

    # ═════════════════════════════════════════════════════════════════════════
    #  2. Inject current system drivers (optional)
    #     Enabled by the "Inject current system drivers" checkbox at the
    #     Mount & Verify step.  Exports ALL drivers from the running system
    #     and injects them into install.wim AND boot.wim index 2 so Windows
    #     Setup can see the target disk on systems with unsupported NVMe or
    #     SATA controllers.
    # ═════════════════════════════════════════════════════════════════════════
    if ($InjectCurrentSystemDrivers) {
        & $Log "Exporting all drivers from running system..."
        $driverExportRoot = Join-Path $env:TEMP "WinUtil_DriverExport_$(Get-Random)"
        New-Item -Path $driverExportRoot -ItemType Directory -Force | Out-Null
        try {
            Export-WindowsDriver -Online -Destination $driverExportRoot | Out-Null

            & $Log "Injecting current system drivers into install.wim..."
            Add-DriversToImage -MountPath $ScratchDir -DriverDir $driverExportRoot -Label "install" -Logger $Log
            & $Log "install.wim driver injection complete."

            # Also inject into boot.wim so Windows Setup can see the target disk.
            if ($ISOContentsDir -and (Test-Path $ISOContentsDir)) {
                $bootWim = Join-Path $ISOContentsDir "sources\boot.wim"
                if (Test-Path $bootWim) {
                    & $Log "Injecting current system drivers into boot.wim..."
                    Invoke-BootWimInject -BootWimPath $bootWim -DriverDir $driverExportRoot -Logger $Log
                } else {
                    & $Log "Warning: boot.wim not found — skipping boot.wim driver injection."
                }
            }
        } catch {
            & $Log "Error during driver export/injection: $_"
        } finally {
            Remove-Item -Path $driverExportRoot -Recurse -Force -ErrorAction SilentlyContinue
        }
    } else {
        & $Log "Driver injection skipped."
    }

    # ═════════════════════════════════════════════════════════════════════════
    #  3. Remove OneDrive
    # ═════════════════════════════════════════════════════════════════════════
    & $Log "Removing OneDrive..."
    & takeown /f "$ScratchDir\Windows\System32\OneDriveSetup.exe" | Out-Null
    & icacls    "$ScratchDir\Windows\System32\OneDriveSetup.exe" /grant "$($adminGroup.Value):(F)" /T /C | Out-Null
    Remove-Item -Path "$ScratchDir\Windows\System32\OneDriveSetup.exe" -Force -ErrorAction SilentlyContinue

    # ═════════════════════════════════════════════════════════════════════════
    #  4. Registry tweaks
    # ═════════════════════════════════════════════════════════════════════════
    & $Log "Loading offline registry hives..."
    reg load HKLM\zCOMPONENTS "$ScratchDir\Windows\System32\config\COMPONENTS"
    reg load HKLM\zDEFAULT    "$ScratchDir\Windows\System32\config\default"
    reg load HKLM\zNTUSER     "$ScratchDir\Users\Default\ntuser.dat"
    reg load HKLM\zSOFTWARE   "$ScratchDir\Windows\System32\config\SOFTWARE"
    reg load HKLM\zSYSTEM     "$ScratchDir\Windows\System32\config\SYSTEM"

    & $Log "Bypassing system requirements..."
    Set-ISOScriptReg 'HKLM\zDEFAULT\Control Panel\UnsupportedHardwareNotificationCache' 'SV1' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zDEFAULT\Control Panel\UnsupportedHardwareNotificationCache' 'SV2' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Control Panel\UnsupportedHardwareNotificationCache'  'SV1' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Control Panel\UnsupportedHardwareNotificationCache'  'SV2' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zSYSTEM\Setup\LabConfig' 'BypassCPUCheck'       'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSYSTEM\Setup\LabConfig' 'BypassRAMCheck'       'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSYSTEM\Setup\LabConfig' 'BypassSecureBootCheck' 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSYSTEM\Setup\LabConfig' 'BypassStorageCheck'   'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSYSTEM\Setup\LabConfig' 'BypassTPMCheck'       'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSYSTEM\Setup\MoSetup'   'AllowUpgradesWithUnsupportedTPMOrCPU' 'REG_DWORD' '1'

    & $Log "Disabling sponsored apps..."
    Set-ISOScriptReg 'HKLM\zNTUSER\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'OemPreInstalledAppsEnabled'  'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'PreInstalledAppsEnabled'     'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SilentInstalledAppsEnabled'  'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\CloudContent' 'DisableWindowsConsumerFeatures' 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'ContentDeliveryAllowed'      'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\PolicyManager\current\device\Start' 'ConfigureStartPins' 'REG_SZ' '{"pinnedList": [{}]}'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'FeatureManagementEnabled'    'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'PreInstalledAppsEverEnabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SoftLandingEnabled'          'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SubscribedContentEnabled'    'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SubscribedContent-310093Enabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SubscribedContent-338388Enabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SubscribedContent-338389Enabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SubscribedContent-338393Enabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SubscribedContent-353694Enabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SubscribedContent-353696Enabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager' 'SystemPaneSuggestionsEnabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\PushToInstall' 'DisablePushToInstall' 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\MRT'           'DontOfferThroughWUAU' 'REG_DWORD' '1'
    Remove-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager\Subscriptions'
    Remove-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager\SuggestedApps'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\CloudContent' 'DisableConsumerAccountStateContent' 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\CloudContent' 'DisableCloudOptimizedContent'       'REG_DWORD' '1'

    & $Log "Enabling local accounts on OOBE..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\Windows\CurrentVersion\OOBE' 'BypassNRO' 'REG_DWORD' '1'

    if ($AutoUnattendXml) {
        # ── Pre-stage embedded setup scripts directly into the WIM ────────────
        # The autounattend.xml (Schneegans generator format) embeds all setup
        # scripts as <Extensions><File> nodes.  The specialize-pass command that
        # is supposed to extract them reads C:\Windows\Panther\unattend.xml, but
        # Windows Setup strips unrecognised-namespace elements (including the
        # entire <Extensions> block) when it copies the answer file to that path.
        # As a result [scriptblock]::Create($null) throws, no scripts are written
        # to C:\Windows\Setup\Scripts\, Specialize.ps1 and DefaultUser.ps1 never
        # run, and FirstLogon.ps1 is absent so FirstLogonCommands silently fails.
        #
        # Writing the scripts directly into the WIM guarantees they are present
        # on the target drive after Windows Setup applies the image, regardless
        # of whether the Panther extraction step succeeds.
        try {
            $xmlDoc = [xml]::new()
            $xmlDoc.LoadXml($AutoUnattendXml)

            $nsMgr = New-Object System.Xml.XmlNamespaceManager($xmlDoc.NameTable)
            $nsMgr.AddNamespace("sg", "https://schneegans.de/windows/unattend-generator/")

            $fileNodes = $xmlDoc.SelectNodes("//sg:File", $nsMgr)
            if ($fileNodes -and $fileNodes.Count -gt 0) {
                foreach ($fileNode in $fileNodes) {
                    # Paths in the XML are absolute Windows paths (e.g. C:\Windows\Setup\Scripts\…).
                    # Strip the drive-letter prefix so we can root them under $ScratchDir.
                    $absPath  = $fileNode.GetAttribute("path")
                    $relPath  = $absPath -replace '^[A-Za-z]:[/\\]', ''
                    $destPath = Join-Path $ScratchDir $relPath
                    $destDir  = Split-Path $destPath -Parent

                    New-Item -Path $destDir -ItemType Directory -Force -ErrorAction SilentlyContinue | Out-Null

                    # Match the encoding logic used by the original ExtractScript.
                    $ext = [IO.Path]::GetExtension($destPath).ToLower()
                    $encoding = switch ($ext) {
                        { $_ -in '.ps1', '.xml' } { [System.Text.Encoding]::UTF8 }
                        { $_ -in '.reg', '.vbs', '.js' } { [System.Text.UnicodeEncoding]::new($false, $true) }
                        default { [System.Text.Encoding]::Default }
                    }
                    $bytes = $encoding.GetPreamble() + $encoding.GetBytes($fileNode.InnerText.Trim())
                    [System.IO.File]::WriteAllBytes($destPath, $bytes)
                    & $Log "Pre-staged setup script: $relPath"
                }
            } else {
                & $Log "Warning: no <Extensions><File> nodes found in autounattend.xml — setup scripts not pre-staged."
            }
        } catch {
            & $Log "Warning: could not pre-stage setup scripts from autounattend.xml: $_"
        }

        # ── Place autounattend.xml at the ISO / USB root ──────────────────────
        # Windows Setup reads this file first (before booting into the OS),
        # which is what drives the local-account / OOBE bypass at install time.
        if ($ISOContentsDir -and (Test-Path $ISOContentsDir)) {
            $isoDest = Join-Path $ISOContentsDir "autounattend.xml"
            Set-Content -Path $isoDest -Value $AutoUnattendXml -Encoding UTF8 -Force
            & $Log "Written autounattend.xml to ISO root ($isoDest)."
        }
    } else {
        & $Log "Warning: autounattend.xml content is empty — skipping OOBE bypass file."
    }

    & $Log "Disabling reserved storage..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\Windows\CurrentVersion\ReserveManager' 'ShippedWithReserves' 'REG_DWORD' '0'

    & $Log "Disabling BitLocker device encryption..."
    Set-ISOScriptReg 'HKLM\zSYSTEM\ControlSet001\Control\BitLocker' 'PreventDeviceEncryption' 'REG_DWORD' '1'

    & $Log "Disabling Chat icon..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\Windows Chat' 'ChatIcon' 'REG_DWORD' '3'
    Set-ISOScriptReg 'HKLM\zNTUSER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced' 'TaskbarMn' 'REG_DWORD' '0'

    & $Log "Disabling OneDrive folder backup..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\OneDrive' 'DisableFileSyncNGSC' 'REG_DWORD' '1'

    & $Log "Disabling telemetry..."
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\AdvertisingInfo' 'Enabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Windows\CurrentVersion\Privacy' 'TailoredExperiencesWithDiagnosticDataEnabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Speech_OneCore\Settings\OnlineSpeechPrivacy' 'HasAccepted' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Input\TIPC' 'Enabled' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\InputPersonalization' 'RestrictImplicitInkCollection'  'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\InputPersonalization' 'RestrictImplicitTextCollection' 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\InputPersonalization\TrainedDataStore' 'HarvestContacts' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zNTUSER\Software\Microsoft\Personalization\Settings' 'AcceptedPrivacyPolicy' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\DataCollection' 'AllowTelemetry' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zSYSTEM\ControlSet001\Services\dmwappushservice' 'Start' 'REG_DWORD' '4'

    & $Log "Preventing installation of DevHome and Outlook..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Orchestrator\UScheduler_Oobe\OutlookUpdate' 'workCompleted' 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Orchestrator\UScheduler\OutlookUpdate'      'workCompleted' 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Orchestrator\UScheduler\DevHomeUpdate'      'workCompleted' 'REG_DWORD' '1'
    Remove-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe\OutlookUpdate'
    Remove-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe\DevHomeUpdate'

    & $Log "Disabling Copilot..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\WindowsCopilot' 'TurnOffWindowsCopilot'    'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Edge'                   'HubsSidebarEnabled'        'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\Explorer'       'DisableSearchBoxSuggestions' 'REG_DWORD' '1'

    & $Log "Disabling Windows Update during OOBE (re-enabled on first logon via FirstLogon.ps1)..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU' 'NoAutoUpdate'              'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU' 'AUOptions'                 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU' 'UseWUServer'               'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\WindowsUpdate'    'DisableWindowsUpdateAccess' 'REG_DWORD' '1'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\WindowsUpdate'    'WUServer'                  'REG_SZ'    'http://localhost:8080'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\WindowsUpdate'    'WUStatusServer'            'REG_SZ'    'http://localhost:8080'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Orchestrator\UScheduler_Oobe\WindowsUpdate' 'workCompleted' 'REG_DWORD' '1'
    Remove-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe\WindowsUpdate'
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Microsoft\Windows\CurrentVersion\DeliveryOptimization\Config' 'DODownloadMode' 'REG_DWORD' '0'
    Set-ISOScriptReg 'HKLM\zSYSTEM\ControlSet001\Services\BITS'         'Start' 'REG_DWORD' '4'
    Set-ISOScriptReg 'HKLM\zSYSTEM\ControlSet001\Services\wuauserv'     'Start' 'REG_DWORD' '4'
    Set-ISOScriptReg 'HKLM\zSYSTEM\ControlSet001\Services\UsoSvc'       'Start' 'REG_DWORD' '4'
    Set-ISOScriptReg 'HKLM\zSYSTEM\ControlSet001\Services\WaaSMedicSvc' 'Start' 'REG_DWORD' '4'

    & $Log "Preventing installation of Teams..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Teams' 'DisableInstallation' 'REG_DWORD' '1'

    & $Log "Preventing installation of new Outlook..."
    Set-ISOScriptReg 'HKLM\zSOFTWARE\Policies\Microsoft\Windows\Windows Mail' 'PreventRun' 'REG_DWORD' '1'

    & $Log "Unloading offline registry hives..."
    reg unload HKLM\zCOMPONENTS
    reg unload HKLM\zDEFAULT
    reg unload HKLM\zNTUSER
    reg unload HKLM\zSOFTWARE
    reg unload HKLM\zSYSTEM

    # ═════════════════════════════════════════════════════════════════════════
    #  5. Delete scheduled task definition files
    # ═════════════════════════════════════════════════════════════════════════
    & $Log "Deleting scheduled task definition files..."
    $tasksPath = "$ScratchDir\Windows\System32\Tasks"

    Remove-Item "$tasksPath\Microsoft\Windows\Application Experience\Microsoft Compatibility Appraiser" -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\Customer Experience Improvement Program"                  -Recurse -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\Application Experience\ProgramDataUpdater"               -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\Chkdsk\Proxy"                                            -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\Windows Error Reporting\QueueReporting"                  -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\InstallService"                                          -Recurse -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\UpdateOrchestrator"                                      -Recurse -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\UpdateAssistant"                                         -Recurse -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\WaaSMedic"                                               -Recurse -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\Windows\WindowsUpdate"                                           -Recurse -Force -ErrorAction SilentlyContinue
    Remove-Item "$tasksPath\Microsoft\WindowsUpdate"                                                   -Recurse -Force -ErrorAction SilentlyContinue

    & $Log "Scheduled task files deleted."

    # ═════════════════════════════════════════════════════════════════════════
    #  6. Remove ISO support folder (fresh-install only; not needed)
    # ═════════════════════════════════════════════════════════════════════════
    if ($ISOContentsDir -and (Test-Path $ISOContentsDir)) {
        & $Log "Removing ISO support\ folder..."
        Remove-Item -Path (Join-Path $ISOContentsDir "support") -Recurse -Force -ErrorAction SilentlyContinue
        & $Log "ISO support\ folder removed."
    }
}