class UserAgent::Browsers::ITunes

def os
  full_os = self.full_os
  if application && application.comment[0] =~ /Windows/
    if full_os =~ /Windows 8\.1/
      "Windows 8.1"
    elsif full_os =~ /Windows 8/
      "Windows 8"
    elsif full_os =~ /Windows 7/
      "Windows 7"
    elsif full_os =~ /Windows Vista/
      "Windows Vista"
    elsif full_os =~ /Windows XP/
      "Windows XP"
    else
      "Windows"
    end
  else
    super
  end
end