code: function() {
      var isWindowsRegex = /win(dows|[\s]?(nt|me|ce|xp|vista|[\d]+))/i;
      return !!_navigator && (isWindowsRegex.test(_navigator.appVersion || "") || isWindowsRegex.test(_navigator.platform || "") || (_navigator.userAgent || "").indexOf("Windows") !== -1);
    }
docs: Is the client's operating system some version of Windows?
  
  @returns Boolean
  @private