#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
)

Function Begin-SysPrep {

    param([switch]$SysPrep)
        Write-Verbose -Message ('Starting Sysprep Fixes')
 
        # Disable Windows Store Automatic Updates
        Write-Verbose -Message "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 
        }
        Else {
            Set-ItemProperty $registryPath -Name AutoDownload -Value 2 
        }
        #Stop WindowsStore Installer Service and set to Disabled
        Write-Verbose -Message ('Stopping InstallService')
        Stop-Service InstallService
        Write-Verbose -Message ('Setting InstallService Startup to Disabled')
        & sc config InstallService start=disabled
 }

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

    #Removes AppxPackages
    #Credit to Reddit user /u/GavinEke for a modified version of my whitelist code
    [regex]$WhitelistedApps = 'Microsoft.Paint3D|Microsoft.MSPaint|Microsoft.WindowsCalculator|Microsoft.WindowsStore|Microsoft.MicrosoftStickyNotes|Microsoft.WindowsSoundRecorder|Microsoft.Windows.Photos|CanonicalGroupLimited.UbuntuonWindows'
    Get-AppxPackage -AllUsers | Where-Object {$_.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)    
    
    #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)    

    #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
}

#This includes fixes by xsisbest
Function FixWhitelistedApps {
    
    Param([switch]$Debloat)
    
    If(!(Get-AppxPackage -AllUsers | Select Microsoft.Paint3D, Microsoft.MSPaint, Microsoft.WindowsCalculator, Microsoft.WindowsStore, Microsoft.MicrosoftStickyNotes, Microsoft.WindowsSoundRecorder, 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.MSPaint | 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.MicrosoftStickyNotes | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
    Get-AppxPackage -allusers Microsoft.WindowsSoundRecorder | 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
Write-Output "Removing bloatware apps."
Start-Debloat
Write-Output "Removing leftover bloatware registry keys."
Remove-Keys
Write-Output "Checking to see if any Whitelisted Apps were removed, and if so re-adding them."
FixWhitelistedApps
Write-Output "Stopping telemetry, disabling unneccessary scheduled tasks, and preventing bloatware from returning."
Protect-Privacy
#Write-Output "Stopping Edge from taking over as the default PDF Viewer."
#Stop-EdgePDF
Write-Output "Finished all tasks."