Automates installation of System Center Endpoint Protection.

Install-SCEP.ps1

<#	
	.NOTES
	===========================================================================
	 Created with: 	SAPIEN Technologies, Inc., PowerShell Studio 2016 v5.2.123
	 Created on:   	6/24/2016 10:24
	 Created by:   	Colin Squier <Hexalon@gmail.com>
	 Filename:     	Install-SCEP.ps1
	===========================================================================
	.DESCRIPTION
		Automates installation of System Center Endpoint Protection.
#>

[CmdletBinding()]
Param (
	[switch]$Uninstall = $false
)

<#
	.SYNOPSIS
		Returns the path of the executing script's directory.
	
	.DESCRIPTION
		Sapien's implementation of the variable $HostInvocation
		causes a conflict the with the system's variable.
	
	.EXAMPLE
		PS C:\> Get-ScriptDirectory
	
	.NOTES
		Work around for handling Sapien's custom host environment.
#>
function Get-ScriptDirectory
{
	if ($null -ne $HostInvocation)
	{
		Split-Path $HostInvocation.MyCommand.path
	}
	else
	{
		Split-Path $script:MyInvocation.MyCommand.Path
	}
}

If (-NOT ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole(`
		[Security.Principal.WindowsBuiltInRole] "Administrator"))
{
	Write-Warning "You do not have Administrator rights to run this script!`nPlease re-run this script as an Administrator!"
	Break
}

$Option = New-CimSessionOption -Protocol Dcom
$Session = New-CimSession -SessionOption $Option -ComputerName $env:COMPUTERNAME
$OS = (Get-CimInstance -ClassName Win32_OperatingSystem -CimSession $Session)
$OSVersion = $OS.Version
$scriptDirectory = Get-ScriptDirectory
$Source = (Split-Path -Path $scriptDirectory -Parent)
$PackagePath = (Join-Path -Path $Source -ChildPath "ComputerSetup\SCCM2012R2Client")
$File = "scepinstall.exe"
$PolicyFile = "ep_defaultpolicy.xml"
switch ($OSVersion)
{
	"6.1.7601"
	{
		$Version = "4.7.214.0"
	}
	"10.0.10240"
	{
		$Version = "4.9.219.0"
	}
	"10.0.10586"
	{
		$Version = "4.9.219.0"
	}
	default
	{
		Write-Error -Message "The computer does not meet system requirements." -Category ResourceUnavailable
	}
}
$Product = "System Center Endpoint Protection"

$FullPath = Join-Path -Path $PackagePath -ChildPath $File
$FullPolicyPath = Join-Path -Path $PackagePath -ChildPath $PolicyFile

$SCEP = (Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' | Where-Object { $_.DisplayName -eq $Product })

if ($Uninstall)
{
	if (!($null -eq $SCEP))
	{
		$InstalledVersion = $SCEP.DisplayVersion
		
		Write-Verbose -Message "Installed $Product version is $InstalledVersion"
		$Removal = Start-Process -FilePath "`"$FullPath`"" -ArgumentList "/u /s /q" -Wait -Passthru -NoNewWindow
		$ExitCode = $Removal.ExitCode
		Write-Verbose -Message "$Product uninstaller exit code: $ExitCode"
		If ($ExitCode -eq 0)
		{
			Write-Verbose -Message "Uninstall was successful."
		}
	}
	else
	{
		Write-Verbose -Message "$Product has already been removed."
	}
	Remove-CimSession -CimSession $Session
	break;
}

if (!($null -eq $SCEP))
{
	$InstalledVersion = $SCEP.DisplayVersion
	
	Write-Verbose "Installed $Product version is $InstalledVersion"
	
	If ([version]$InstalledVersion -ge $Version)
	{
		Write-Verbose "$Product version $InstalledVersion or later already installed."
	}
}

if ($null -eq $InstalledVersion -or [version]$InstalledVersion -lt $Version)
{
	Write-Verbose "Installing $Product $Version"
	$SCEP = Start-Process -FilePath "`"$FullPath`"" -ArgumentList "/s /q /policy `"$FullPolicyPath`"" -Wait -Passthru -NoNewWindow
	$ExitCode = $SCEP.ExitCode
	Write-Verbose "$Product installer exit code: $ExitCode"
}

Remove-CimSession -CimSession $Session