Have you ever started a new job with a fresh computer? Setting everything up to be able to start creating can take hours. RailsInstaller streamlines the process for Rails developers to enable them to be successful.
does exactly what it claims to do, fixes all the nasty ruby environment set-up work for you.. no errors for me... everything worked just fine..
Error: Railsinstaller: file name extension is 2.2.1 Windows doesn't know what to use to open the file. Extension should be "zip" or "exe".