#This function finds any AppX/AppXProvisioned package and uninstalls it, except for Freshpaint, Windows Calculator, Windows Store, and Windows Photos.
#Also, to note - This does NOT remove essential system services/software/etc such as .NET framework installations, Cortana, Edge, etc.

#This is the switch parameter for running this script as a 'silent' script, for use in MDT images or any type of mass deployment without user interaction.

param (
    [switch]$Debloat, [switch]$SysPrep, [switch]$StopEdgePDF
)
$ErrorActionPreference = 'SilentlyContinue'
Function Remove-AppxPackagesForSysprep {
    $AppXApps = @(

        #Unnecessary Windows 10 AppX Apps
        "*Microsoft.BingNews*"
        "*Microsoft.DesktopAppInstaller*"
        "*Microsoft.GetHelp*"
        "*Microsoft.Getstarted*"
        "*Microsoft.Messaging*"
        "*Microsoft.Microsoft3DViewer*"
        "*Microsoft.MicrosoftOfficeHub*"
        "*Microsoft.MicrosoftSolitaireCollection*"
        "*Microsoft.NetworkSpeedTest*"
        "*Microsoft.Office.OneNote*"
        "*Microsoft.Office.Sway*"
        "*Microsoft.OneConnect*"
        "*Microsoft.People*"
        "*Microsoft.Print3D*"
        "*Microsoft.RemoteDesktop*"
        "*Microsoft.SkypeApp*"
        "*Microsoft.StorePurchaseApp*"
        "*Microsoft.WindowsAlarms*"
        "*Microsoft.WindowsCamera*"
        "*microsoft.windowscommunicationsapps*"
        "*Microsoft.WindowsFeedbackHub*"
        "*Microsoft.WindowsMaps*"
        "*Microsoft.WindowsSoundRecorder*"
        "*Microsoft.Xbox.TCUI*"
        "*Microsoft.XboxApp*"
        "*Microsoft.XboxGameOverlay*"
        "*Microsoft.XboxIdentityProvider*"
        "*Microsoft.XboxSpeechToTextOverlay*"
        "*Microsoft.ZuneMusic*"
        "*Microsoft.ZuneVideo*"

        #Sponsored Windows 10 AppX Apps
        #Add sponsored/featured apps to remove in the "*AppName*" format
        "*EclipseManager*"
        "*ActiproSoftwareLLC*"
        "*AdobeSystemsIncorporated.AdobePhotoshopExpress*"
        "*Duolingo-LearnLanguagesforFree*"
        "*PandoraMediaInc*"
        "*CandyCrush*"
        "*Wunderlist*"
        "*Flipboard*"
        "*Twitter*"
        "*Facebook*"
        "*Spotify*"

        #Optional: Typically not removed but you can if you need to for some reason
        #"*Microsoft.Advertising.Xaml_10.1712.5.0_x64__8wekyb3d8bbwe*"
        #"*Microsoft.Advertising.Xaml_10.1712.5.0_x86__8wekyb3d8bbwe*"
        #"*Microsoft.BingWeather*"
        #"*Microsoft.MSPaint*"
        #"*Microsoft.MicrosoftStickyNotes*"
        #"*Microsoft.Windows.Photos*"
        #"*Microsoft.WindowsCalculator*"
        #"*Microsoft.WindowsStore*"
    )
    foreach ($App in $AppXApps) {
        Get-AppxPackage -Name $App | Remove-AppxPackage -ErrorAction SilentlyContinue
        Get-AppxPackage -Name $App -AllUsers | Remove-AppxPackage -AllUsers -ErrorAction SilentlyContinue
        Get-AppxProvisionedPackage -Online | Where-Object DisplayName -like $App | Remove-AppxProvisionedPackage -Online -ErrorAction SilentlyContinue
    }

}

#This will run get-appxpackage | remove-appxpackage which is required for sysprep to provision the apps.
Function Begin-SysPrep {

    param([switch]$SysPrep)
    IF ($SysPrep) {
        get-appxpackage | remove-appxpackage -ErrorAction SilentlyContinue
        Remove-AppxPackagesForSysprep -ErrorAction SilentlyContinue
        # Disable Windows Store Automatic Updates
        Write-Output "Adding Registry key to Disable Windows Store Automatic Updates"
        $registryPath = "HKLM:\SOFTWARE\Policies\Microsoft\WindowsStore"
        If (!(Test-Path $registryPath)) {
            Mkdir $registryPath -ErrorAction SilentlyContinue
            New-ItemProperty $registryPath -Name AutoDownload -Value 2 -Verbose -ErrorAction SilentlyContinue
        }
        Else {
            Set-ItemProperty $registryPath -Name AutoDownload -Value 2 -Verbose -ErrorAction SilentlyContinue
        }
        # Disable Microsoft Consumer Experience
        Write-Output "Adding Registry key to prevent bloatware apps from returning"
        #Prevents bloatware applications from returning
        $registryPath = "HKLM:\SOFTWARE\Policies\Microsoft\Windows\CloudContent"
        If (!(Test-Path $registryPath)) {
            Mkdir $registryPath -ErrorAction SilentlyContinue
            New-ItemProperty $registryPath -Name DisableWindowsConsumerFeatures -Value 1 -Verbose -ErrorAction SilentlyContinue
        }
        Else {
            Set-ItemProperty $registryPath -Name DisableWindowsConsumerFeatures -Value 1 -Verbose -ErrorAction SilentlyContinue
        }
        #Stop WindowsStore Installer Service and set to Disabled
        Stop-Service InstallService
        & sc config InstallService start=disabled
    }
}


Function Start-Debloat {

    param([switch]$Debloat)
    IF ($Debloat) {
        #Removes AppxPackages
        #Credit to Reddit user /u/GavinEke for a modified version of my whitelist code
        [regex]$WhitelistedApps = 'Microsoft.Paint3D|Microsoft.WindowsCalculator|Microsoft.WindowsStore|Microsoft.Windows.Photos|CanonicalGroupLimited.UbuntuonWindows'
        Get-AppxPackage -AllUsers | Where-Object {$_.Name -NotMatch $WhitelistedApps} | Remove-AppxPackage -ErrorAction SilentlyContinue
        Get-AppxProvisionedPackage -Online | Where-Object {$_.PackageName -NotMatch $WhitelistedApps} | Remove-AppxProvisionedPackage -Online -ErrorAction SilentlyContinue
    }
}

Function Remove-Keys {

    Param([switch]$Debloat)
    if ($Debloat) {
        #Creates a PSDrive to be able to access the 'HKCR' tree
        New-PSDrive -Name HKCR -PSProvider Registry -Root HKEY_CLASSES_ROOT
        #These are the registry keys that it will delete.

        $Keys = @(

            #Remove Background Tasks
            "HKCR:\Extensions\ContractId\Windows.BackgroundTasks\PackageId\46928bounde.EclipseManager_2.2.4.51_neutral__a5h4egax66k6y"
            "HKCR:\Extensions\ContractId\Windows.BackgroundTasks\PackageId\ActiproSoftwareLLC.562882FEEB491_2.6.18.18_neutral__24pqs290vpjk0"
            "HKCR:\Extensions\ContractId\Windows.BackgroundTasks\PackageId\Microsoft.MicrosoftOfficeHub_17.7909.7600.0_x64__8wekyb3d8bbwe"
            "HKCR:\Extensions\ContractId\Windows.BackgroundTasks\PackageId\Microsoft.PPIProjection_10.0.15063.0_neutral_neutral_cw5n1h2txyewy"
            "HKCR:\Extensions\ContractId\Windows.BackgroundTasks\PackageId\Microsoft.XboxGameCallableUI_1000.15063.0.0_neutral_neutral_cw5n1h2txyewy"
            "HKCR:\Extensions\ContractId\Windows.BackgroundTasks\PackageId\Microsoft.XboxGameCallableUI_1000.16299.15.0_neutral_neutral_cw5n1h2txyewy"

            #Windows File
            "HKCR:\Extensions\ContractId\Windows.File\PackageId\ActiproSoftwareLLC.562882FEEB491_2.6.18.18_neutral__24pqs290vpjk0"

            #Registry keys to delete if they aren't uninstalled by RemoveAppXPackage/RemoveAppXProvisionedPackage
            "HKCR:\Extensions\ContractId\Windows.Launch\PackageId\46928bounde.EclipseManager_2.2.4.51_neutral__a5h4egax66k6y"
            "HKCR:\Extensions\ContractId\Windows.Launch\PackageId\ActiproSoftwareLLC.562882FEEB491_2.6.18.18_neutral__24pqs290vpjk0"
            "HKCR:\Extensions\ContractId\Windows.Launch\PackageId\Microsoft.PPIProjection_10.0.15063.0_neutral_neutral_cw5n1h2txyewy"
            "HKCR:\Extensions\ContractId\Windows.Launch\PackageId\Microsoft.XboxGameCallableUI_1000.15063.0.0_neutral_neutral_cw5n1h2txyewy"
            "HKCR:\Extensions\ContractId\Windows.Launch\PackageId\Microsoft.XboxGameCallableUI_1000.16299.15.0_neutral_neutral_cw5n1h2txyewy"

            #Scheduled Tasks to delete
            "HKCR:\Extensions\ContractId\Windows.PreInstalledConfigTask\PackageId\Microsoft.MicrosoftOfficeHub_17.7909.7600.0_x64__8wekyb3d8bbwe"

            #Windows Protocol Keys
            "HKCR:\Extensions\ContractId\Windows.Protocol\PackageId\ActiproSoftwareLLC.562882FEEB491_2.6.18.18_neutral__24pqs290vpjk0"
            "HKCR:\Extensions\ContractId\Windows.Protocol\PackageId\Microsoft.PPIProjection_10.0.15063.0_neutral_neutral_cw5n1h2txyewy"
            "HKCR:\Extensions\ContractId\Windows.Protocol\PackageId\Microsoft.XboxGameCallableUI_1000.15063.0.0_neutral_neutral_cw5n1h2txyewy"
            "HKCR:\Extensions\ContractId\Windows.Protocol\PackageId\Microsoft.XboxGameCallableUI_1000.16299.15.0_neutral_neutral_cw5n1h2txyewy"

            #Windows Share Target
            "HKCR:\Extensions\ContractId\Windows.ShareTarget\PackageId\ActiproSoftwareLLC.562882FEEB491_2.6.18.18_neutral__24pqs290vpjk0"
        )

        #This writes the output of each key it is removing and also removes the keys listed above.
        ForEach ($Key in $Keys) {
            Write-Output "Removing $Key from registry"
            Remove-Item $Key -Recurse -ErrorAction SilentlyContinue
        }
    }
}

Function Protect-Privacy {

    Param([switch]$Debloat)
    if ($Debloat) {
        #Creates a PSDrive to be able to access the 'HKCR' tree
        New-PSDrive -Name HKCR -PSProvider Registry -Root HKEY_CLASSES_ROOT

        #Disables Windows Feedback Experience
        Write-Output "Disabling Windows Feedback Experience program"
        $Advertising = 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\AdvertisingInfo'
        If (Test-Path $Advertising) {
            Set-ItemProperty $Advertising -Name Enabled -Value 0 -Verbose
        }

        #Stops Cortana from being used as part of your Windows Search Function
        Write-Output "Stopping Cortana from being used as part of your Windows Search Function"
        $Search = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Windows Search'
        If (Test-Path $Search) {
            Set-ItemProperty $Search -Name AllowCortana -Value 0 -Verbose
        }

        #Stops the Windows Feedback Experience from sending anonymous data
        Write-Output "Stopping the Windows Feedback Experience program"
        $Period1 = 'HKCU:\Software\Microsoft\Siuf'
        $Period2 = 'HKCU:\Software\Microsoft\Siuf\Rules'
        $Period3 = 'HKCU:\Software\Microsoft\Siuf\Rules\PeriodInNanoSeconds'
        If (!(Test-Path $Period3)) {
            mkdir $Period1 -ErrorAction SilentlyContinue
            mkdir $Period2 -ErrorAction SilentlyContinue
            mkdir $Period3 -ErrorAction SilentlyContinue
            New-ItemProperty $Period3 -Name PeriodInNanoSeconds -Value 0 -Verbose -ErrorAction SilentlyContinue
        }

        Write-Output "Adding Registry key to prevent bloatware apps from returning"
        #Prevents bloatware applications from returning
        $registryPath = "HKLM:\SOFTWARE\Policies\Microsoft\Windows\CloudContent"
        If (!(Test-Path $registryPath)) {
            Mkdir $registryPath -ErrorAction SilentlyContinue
            New-ItemProperty $registryPath -Name DisableWindowsConsumerFeatures -Value 1 -Verbose -ErrorAction SilentlyContinue
        }

        Write-Output "Setting Mixed Reality Portal value to 0 so that you can uninstall it in Settings"
        $Holo = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Holographic'
        If (Test-Path $Holo) {
            Set-ItemProperty $Holo -Name FirstRunSucceeded -Value 0 -Verbose
        }

        #Disables live tiles
        Write-Output "Disabling live tiles"
        $Live = 'HKCU:\SOFTWARE\Policies\Microsoft\Windows\CurrentVersion\PushNotifications'
        If (!(Test-Path $Live)) {
            mkdir $Live -ErrorAction SilentlyContinue
            New-ItemProperty $Live -Name NoTileApplicationNotification -Value 1 -Verbose
        }

        #Turns off Data Collection via the AllowTelemtry key by changing it to 0
        Write-Output "Turning off Data Collection"
        $DataCollection = 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\DataCollection'
        If (Test-Path $DataCollection) {
            Set-ItemProperty $DataCollection -Name AllowTelemetry -Value 0 -Verbose
        }

        #Disables People icon on Taskbar
        Write-Output "Disabling People icon on Taskbar"
        $People = 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\People'
        If (!(Test-Path $People)) {
            mkdir $People -ErrorAction SilentlyContinue
            New-ItemProperty $People -Name PeopleBand -Value 0 -Verbose
        }

        #Disables suggestions on start menu
        Write-Output "Disabling suggestions on the Start Menu"
        $Suggestions = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\ContentDeliveryManager'
        If (Test-Path $Suggestions) {
            Set-ItemProperty $Suggestions -Name SystemPaneSuggestionsEnabled -Value 0 -Verbose
        }

        #Loads the registry keys/values below into the NTUSER.DAT file which prevents the apps from redownloading. Credit to a60wattfish
        reg load HKU\Default_User C:\Users\Default\NTUSER.DAT
        Set-ItemProperty -Path Registry::HKU\Default_User\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager -Name SystemPaneSuggestionsEnabled -Value 0
        Set-ItemProperty -Path Registry::HKU\Default_User\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager -Name PreInstalledAppsEnabled -Value 0
        Set-ItemProperty -Path Registry::HKU\Default_User\SOFTWARE\Microsoft\Windows\CurrentVersion\ContentDeliveryManager -Name OemPreInstalledAppsEnabled -Value 0
        reg unload HKU\Default_User

        #Disables scheduled tasks that are considered unnecessary
        Write-Output "Disabling scheduled tasks"
        Get-ScheduledTask -TaskName XblGameSaveTaskLogon | Disable-ScheduledTask -ErrorAction SilentlyContinue
        Get-ScheduledTask -TaskName XblGameSaveTask | Disable-ScheduledTask -ErrorAction SilentlyContinue
        Get-ScheduledTask -TaskName Consolidator | Disable-ScheduledTask -ErrorAction SilentlyContinue
        Get-ScheduledTask -TaskName UsbCeip | Disable-ScheduledTask -ErrorAction SilentlyContinue
        Get-ScheduledTask -TaskName DmClient | Disable-ScheduledTask -ErrorAction SilentlyContinue
        Get-ScheduledTask -TaskName DmClientOnScenarioDownload | Disable-ScheduledTask -ErrorAction SilentlyContinue
    }
}

Function Stop-EdgePDF {

    param([switch]$StopEdgePDF)
    IF ($StopEdgePDF) {
        #Stops edge from taking over as the default .PDF viewer
        Write-Output "Stopping Edge from taking over as the default .PDF viewer"
        $NoOpen = 'HKCR:\.pdf'
        If (!(Get-ItemProperty $NoOpen -Name NoOpenWith)) {
            New-ItemProperty $NoOpen -Name NoOpenWith -Verbose -ErrorAction SilentlyContinue
        }

        $NoStatic = 'HKCR:\.pdf'
        If (!(Get-ItemProperty $NoStatic -Name NoStaticDefaultVerb)) {
            New-ItemProperty $NoStatic -Name NoStaticDefaultVerb -Verbose -ErrorAction SilentlyContinue
        }

        $NoOpen = 'HKCR:\.pdf\OpenWithProgids'
        If (!(Get-ItemProperty $NoOpen -Name NoOpenWith)) {
            New-ItemProperty $NoOpen -Name NoOpenWith -Verbose -ErrorAction SilentlyContinue
        }

        $NoStatic = 'HKCR:\.pdf\OpenWithProgids'
        If (!(Get-ItemProperty $NoStatic -Name NoStaticDefaultVerb)) {
            New-ItemProperty $NoStatic -Name NoStaticDefaultVerb -Verbose -ErrorAction SilentlyContinue
        }

        $NoOpen = 'HKCR:\.pdf\OpenWithList'
        If (!(Get-ItemProperty $NoOpen -Name NoOpenWith)) {
            New-ItemProperty $NoOpen -Name NoOpenWith -Verbose -ErrorAction SilentlyContinue
        }

        $NoStatic = 'HKCR:\.pdf\OpenWithList'
        If (!(Get-ItemProperty $NoStatic -Name NoStaticDefaultVerb)) {
            New-ItemProperty $NoStatic -Name NoStaticDefaultVerb -Verbose -ErrorAction SilentlyContinue
        }

        #Appends an underscore '_' to the Registry key for Edge
        $Edge = 'HKCR:\AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723'
        If (Test-Path $Edge) {
            Set-Item $Edge AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723_ -Verbose
        }
    }
}

Function FixWhitelistedApps {

    Param([switch]$Debloat)
    IF ($Debloat) {
        If (!(Get-AppxPackage -AllUsers | Select Microsoft.Paint3D, Microsoft.WindowsCalculator, Microsoft.WindowsStore, Microsoft.Windows.Photos)) {

            #Credit to abulgatz for the 4 lines of code
            Get-AppxPackage -allusers Microsoft.Paint3D | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
            Get-AppxPackage -allusers Microsoft.WindowsCalculator | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
            Get-AppxPackage -allusers Microsoft.WindowsStore | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
            Get-AppxPackage -allusers Microsoft.Windows.Photos | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
        }
    }
}

Write-Output "Initiating Sysprep"
Begin-SysPrep @PSBoundParameters
Write-Output "Removing bloatware apps."
Start-Debloat @PSBoundParameters
Write-Output "Removing leftover bloatware registry keys."
Remove-Keys @PSBoundParameters
Write-Output "Checking to see if any Whitelisted Apps were removed, and if so re-adding them."
FixWhitelistedApps @PSBoundParameters
Write-Output "Stopping telemetry, disabling unneccessary scheduled tasks, and preventing bloatware from returning."
Protect-Privacy @PSBoundParameters
Write-Output "Stopping Edge from taking over as the default PDF Viewer."
Stop-EdgePDF @PSBoundParameters
Write-Output "Finished all tasks."