Get the version of IIS installed

Get-IISVersion.ps1

    $w3wpPath = $Env:WinDir + "\System32\inetsrv\w3wp.exe" 
    If(Test-Path $w3wpPath) { 
        $productProperty = Get-ItemProperty -Path $w3wpPath 
        Write-Host $productProperty.VersionInfo.ProductVersion 
    } 
    Else { 
        Write-Host "Not find IIS." 
    }