Disable-UpdateService.ps1

# Microsoft Windows Powershell Script
#
# Name: Disable Update Service
# Version: 0.2.2.0
# Date: 2020-11-25
# Author: MMillar
# https://github.com/mmillar-bolis
# http://www.bolis.com
#
# License:
# The MIT License
# Copyright (c) 2020, The Bolis Group
#
# Description:
# Prevent the update services from running.
#
# WaaSMedicSvc
# BITS
# DoSvc
# UsoSvc
# wuauserv
#

#Requires -Version 5
#Requires -RunAsAdministrator

function Set-ServiceToAuto {
    param(
		[Parameter(Mandatory=$true)]
		[String]$Name
	)

	$private:Service = (Get-CimInstance -ClassName Win32_Service | where { $_.Name -match "$Name" })

	$ServiceHash = @{
		Name = $private:Service.Name
		StartupType = 'Automatic'
	}

	if ( $private:Service.StartMode -match 'Disabled' ) {
		$private:RegistryNotify = [System.Text.StringBuilder]::new()
		[void]$private:RegistryNotify.Append('Setting service [')
		[void]$private:RegistryNotify.Append($private:Service.DisplayName)
		[void]$private:RegistryNotify.Append('] startup value to [')
		[void]$private:RegistryNotify.Append($ServiceHash.StartupType)
		[void]$private:RegistryNotify.Append(']')
		$private:RegistryNotify.ToString()

		try{
			Set-Service @ServiceHash
		}
		catch{
			"Unable to modify startup for service: $private:Service"
		}
	} else {
		$private:SuccessNotify = [System.Text.StringBuilder]::new()
		[void]$private:SuccessNotify.Append('Service [')
		[void]$private:SuccessNotify.Append($private:Service.DisplayName)
		[void]$private:SuccessNotify.Append('] is already enabled')
		$private:SuccessNotify.ToString()
	}
}

function Disable-ServiceByRegistry {
    param(
		[Parameter(Mandatory=$true)]
		[String]$Name
	)

	$private:Service = (Get-CimInstance -ClassName Win32_Service | where { $_.Name -match "$Name" })

	$RegistryHash = @{
		Path = "HKLM:\SYSTEM\CurrentControlSet\Services\$Name"
		Name = 'Start'
		Value = 4
		Force = $true
	}

	if ( $private:Service.StartMode -notmatch 'Disabled' ) {
		$private:RegistryNotify = [System.Text.StringBuilder]::new()
		[void]$private:RegistryNotify.Append('Forcing service [')
		[void]$private:RegistryNotify.Append($private:Service.DisplayName)
		[void]$private:RegistryNotify.Append('] startup registry value to [4](disabled)')
		$private:RegistryNotify.ToString()

		try{
			Set-ItemProperty @RegistryHash
		}
		catch{
			"Unable to change registry value for service: $private:Service"
		}
	} else {
		$private:SuccessNotify = [System.Text.StringBuilder]::new()
		[void]$private:SuccessNotify.Append('Service [')
		[void]$private:SuccessNotify.Append($private:Service.DisplayName)
		[void]$private:SuccessNotify.Append('] is already disabled')
		$private:SuccessNotify.ToString()
	}
}

function Stop-ServiceByPID {
    param(
		[Parameter(Mandatory=$true)]
		[String]$Name
	)

	$private:Service = (Get-CimInstance -ClassName Win32_Service | where { $_.Name -match "$Name" })

	$ProcessHash = @{
		Id = $private:Service.ProcessID
		Force = $true
		ErrorAction = 'SilentlyContinue'
	}

	if ( $private:Service.State -notmatch 'Stopped' ) {
		try {
			do {
				$private:ProcessNotify = [System.Text.StringBuilder]::new()
				[void]$private:ProcessNotify.Append('Stopping service [')
				[void]$private:ProcessNotify.Append($private:Service.DisplayName)
				[void]$private:ProcessNotify.Append('] by PID [')
				[void]$private:ProcessNotify.Append($private:Service.ProcessID)
				[void]$private:ProcessNotify.Append(']')
				$private:ProcessNotify.ToString()

				Stop-Process @ProcessHash
				Start-Sleep -Milliseconds 200
			} until ( ($private:Service | Get-CimInstance).State -match 'Stopped' )
			if ( ($private:Service | Get-CimInstance).State -match 'Stopped' ) {
				$private:SuccessNotify = [System.Text.StringBuilder]::new()
				[void]$private:SuccessNotify.Append('Service [')
				[void]$private:SuccessNotify.Append($private:Service.DisplayName)
				[void]$private:SuccessNotify.Append('] is now stopped')
				$private:SuccessNotify.ToString()
			}
		} catch {
			"Unable to stop service $private:Service"
		}

	} else {
		
	}
}

function Enable-UpdateService {
	[CmdletBinding()]
    param(
		[Parameter()]
		[string[]]$ServiceList = @( 'BITS',
									'DoSvc',
									'UsoSvc',
									'wuauserv'
									)
	)
	begin{}
	process{
		foreach ($item in $ServiceList) {
			Set-ServiceToAuto -Name $item
		}
	}
	end{}
}

function Disable-UpdateService {
	[CmdletBinding()]
    param(
		[Parameter()]
		[string[]]$ServiceList = @( 'WaaSMedicSvc',
									'BITS',
									'DoSvc',
									'UsoSvc',
									'wuauserv'
									)
	)
	begin{}
	process{
		foreach ($item in $ServiceList) {
			Disable-ServiceByRegistry -Name $item
			Stop-ServiceByPID -Name $item
		}
	}
	end{}
}

#Enable-UpdateService
Disable-UpdateService