Developing on x64 Windows 7 machine, Ruby 2.0, Rails 4.0.0. To utilize has_password functionality, I needed to install BCrypt. Rails 4.0.0 supports BCrypt 3.0.0-3.0.9. However, those versions of BCrypt do not work on a x64 Windows machine and I had to update to BCrypt 3.1.2.Developing on x64 Windows 7 machine, Ruby 2.0,