installation of ruby on rails using railsinstaller for windows-Collection of common programming errors

i had downloaded package railsinstaller for windows and had successfully installed it.

After that i followed these steps and got that window of localhost:3000 running successfully.

But now when i again starts it following error(in the image link) comes.

http://tinypic.com/r/11ch4ix/6

what should i do to solve this??

ruby -v command was also applied and everything is installed properly.

Thanks in advance!

1. Ruby on Rails needs a Javascript runtime installed on your computer.

   First you should try putting the ExecJS gem in comment again (in your gemfile.rb).

   Else you could install NodeJS, as it contains a Javascript runtime (V8 – used by Chrome).

   Good luck!