# File lib/chef-config/config.rb, line 777
    def self.set_defaults_for_windows
      # Those lists of regular expressions define what chef considers a
      # valid user and group name
      # From http://technet.microsoft.com/en-us/library/cc776019(WS.10).aspx
      principal_valid_regex_part = '[^"\/\\\\\[\]\:;|=,+*?<>]+'
      default :user_valid_regex, [ /^(#{principal_valid_regex_part}\\)?#{principal_valid_regex_part}$/ ]
      default :group_valid_regex, [ /^(#{principal_valid_regex_part}\\)?#{principal_valid_regex_part}$/ ]

      default :fatal_windows_admin_check, false
    end