Inicialmente eu tenhoruby 1.9.3 versão instalada no meu windows 7 e eu instaleiruby 2.0.0p195 recentemente e testei a partir do comando promot (ruby -v; ruby -e "puts 100"; irb ) funciona muito bem.

ruby -v dáruby 2.0.0p195 (2013-05-14) [i386-mingw32]

gem -v me dá2.0.2

Quando estou tentando instalar rails, sempre recebo o erro abaixo:

comhttp://rubygems.org

C:\Users\san>gem install rails --source http://rubygems.org
ERROR:  Could not find a valid gem 'rails' (>= 0), here is why:
          Unable to download data from https://rubygems.org/ - Errno::ETIMEDOUT:
 A connection attempt failed because the connected party did not properly respon
d after a period of time, or established connection failed because connected hos
t has failed to respond. - connect(2) (https://rubygems.org/latest_specs.4.8.gz)

ou

comhttps://rubygems.org

C:\Users\san>gem install rails --debug -V
Exception `Errno::EEXIST' at C:/Ruby200/lib/ruby/2.0.0/fileutils.rb:245 - File e
xists - C:/Users/san/.gem/specs/rubygems.org%443
HEAD https://rubygems.org/latest_specs.4.8.gz
Exception `OpenSSL::SSL::SSLError' at C:/Ruby200/lib/ruby/2.0.0/openssl/bufferin
g.rb:174 - read would block
302 Moved Temporarily
HEAD https://s3.amazonaws.com/production.s3.rubygems.org/latest_specs.4.8.gz
Exception `OpenSSL::SSL::SSLError' at C:/Ruby200/lib/ruby/2.0.0/openssl/bufferin
g.rb:174 - read would block
200 OK
GET https://rubygems.org/latest_specs.4.8.gz
Exception `Errno::ETIMEDOUT' at C:/Ruby200/lib/ruby/2.0.0/net/http.rb:878 - A co
nnection attempt failed because the connected party did not properly respond aft
er a period of time, or established connection failed because connected host has
 failed to respond. - connect(2)

Como estou recebendo muitos erros, eu desinstalei ambas as versões do Ruby e reiniciei o sistema e instalei de volta (como sugerido após o googling e de algumas poucas perguntas sobre o stackoverflow). Mas não ajudou muito. Nota: Eu desliguei o firewall do Windows e tentei instalar. Mas ainda estou recebendo exceção com o problema openSSL. Por favor, sugira sobre isso. Obrigado!