Automates .NET Framework 3.5 installation on Win10

Install-NetFx3.Win10.ps1

<#	
	.NOTES
	===========================================================================
	 Created with: 	SAPIEN Technologies, Inc., PowerShell Studio 2016 v5.2.116
	 Created on:   	3/9/2016 13:59
	 Created by:   	Colin Squier <hexalon@gmail.com>
	 Filename:     	Install-NetFx3.Win10.ps1
	===========================================================================
	.DESCRIPTION
		Automates .NET Framework 3.5 installation on Win10. The script will
		mount a Windows 10 ISO from the same directory as the script. Tested on
		the GA release of Windows 10 and version 1511. Script will produce no
		non-error output unless verbose output is requested.
#>

[CmdletBinding()]
Param ()

<#
	.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 ($HostInvocation -ne $null)
	{
		Split-Path $HostInvocation.MyCommand.path
	}
	else
	{
		Split-Path $script:MyInvocation.MyCommand.Path
	}
}

if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole(`
[Security.Principal.WindowsBuiltInRole] "Administrator"))
{
	$Arguments = "& '" + $MyInvocation.MyCommand.Definition + "'"
	Start-Process powershell -Verb RunAs -ArgumentList $Arguments
	Break
}

$RequiredOSVersion = "10.0.10240" #RTM version of Windows 10
$Option = New-CimSessionOption -Protocol Dcom
$Session = New-CimSession -SessionOption $Option -ComputerName $env:COMPUTERNAME

$OS = (Get-CimInstance -ClassName Win32_OperatingSystem -CimSession $Session)
$OSName = $OS.Caption
$OSVersion = $OS.Version
$OSProductType = $OS.ProductType
$OSArch = $OS.OSArchitecture

$scriptDirectory = Get-ScriptDirectory

Write-Verbose -Message "OS edition: $OSName`r OS version: $OSVersion`r OS architecture: $OSArch`r OS product type: $OSProductType"

if (([version]$OSVersion -ge $RequiredOSVersion) -and ($OSProductType -eq 1))
{
	$NetFx35 = (Get-WindowsOptionalFeature -FeatureName NetFx3 -Online)
	if ($NetFx35.State -ne "Enabled")
	{
		$WindowsISO = "SW_DVD5_WIN_ENT_10_64BIT_English_MLF_X20-26061.ISO"
		$WindowsISOFullPath = Join-Path -Path $scriptDirectory -ChildPath $WindowsISO
		Write-Verbose "Installing .NET Framework 3.5"
		Write-Verbose "Mounting Windows ISO"
		Mount-DiskImage -ImagePath $WindowsISOFullPath -PassThru
		$DriveLetter = ((Get-DiskImage $WindowsISOFullPath | Get-Volume).DriveLetter)
		$DriveLetter = $DriveLetter + ":"
		$FullWindowsSourcePath = Join-Path -Path $DriveLetter -ChildPath "Sources\SxS"
		Enable-WindowsOptionalFeature -Online -FeatureName NetFx3 -All -LimitAccess -Source $FullWindowsSourcePath
		Write-Verbose "Dismounting Windows ISO"
		Dismount-DiskImage -ImagePath $WindowsISOFullPath
	}
	else
	{
		Write-Verbose ".Net Framework 3.5 already installed, skipping."
	}
}
else
{
	Write-Error -Message "The operating system does not meet system requirements." -Category InvalidOperation
}

Remove-CimSession -CimSession $Session