# File lib/guard/notifiers/rb_notifu.rb, line 41
      def available?(silent = false)
        if RbConfig::CONFIG['host_os'] =~ /mswin|mingw/
          require 'rb-notifu'

          true

        else
          ::Guard::UI.error 'The :notifu notifier runs only on Windows.' unless silent
          false
        end

      rescue LoadError
        ::Guard::UI.error "Please add \"gem 'rb-notifu'\" to your Gemfile and run Guard with \"bundle exec\"." unless silent
        false
      end