Powershell conditionals
From wikinotes
if ($PATH[0] -ne 'C:\Python27') { ... } # if statement
if (!( $PATH.Contains('C:\Python27') )){ ... } # if not statement
if ($PATH[0] -ne 'C:\Python27') { ... } # if statement
if (!( $PATH.Contains('C:\Python27') )){ ... } # if not statement