host /c/temp
$ gem install chefspec
WARNING:  Error fetching data: SocketError: getaddrinfo: No such host is known.  (http://rubygems.org/latest_specs.4.8.gz)
ERROR:  Could not find a valid gem 'chefspec' (>= 0) in any repository
ERROR:  Possible alternatives: chefspec

host /c/temp
$ gem -v
1.8.28

host /c/temp
$ ruby -v
ruby 1.9.3p484 (2013-11-22) [i386-mingw32]

host /c/temp
$ gem update --system
WARNING:  Error fetching data: SocketError: getaddrinfo: No such host is known.  (http://rubygems.org/latest_specs.4.8.gz)
Updating rubygems-update
WARNING:  Error fetching data: SocketError: getaddrinfo: No such host is known.  (http://rubygems.org/specs.4.8.gz)
ERROR:  While executing gem ... (Gem::GemNotFoundException)
    Could not find a valid gem 'rubygems-update' (2.2.2) locally or in a repository