I was running through a tutorial and now I can't start my dev server

I'm new so I just can't figure out what's going on here. I was going
through a tutorial to learn the ins and outs of Rails and then it just
stopped working.

I'm running RubyMine on Windows for now. Here are the errors:
[rake --tasks] rake aborted!
Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs
for a list of available runtimes.
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/execjs-1.2.11/
lib/execjs/runtimes.rb:47:in `autodetect'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/execjs-1.2.11/
lib/execjs.rb:5:in `<module:ExecJS>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/execjs-1.2.11/
lib/execjs.rb:4:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
script-2.2.0/lib/coffee_script.rb:1:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
script-2.2.0/lib/coffee_script.rb:1:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
script-2.2.0/lib/coffee-script.rb:1:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
script-2.2.0/lib/coffee-script.rb:1:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
rails-3.1.1/lib/coffee-rails.rb:1:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/coffee-
rails-3.1.1/lib/coffee-rails.rb:1:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:68:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:68:in `block (2 levels) in require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:66:in `each'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:66:in `block in require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:55:in `each'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler/runtime.rb:55:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/
lib/bundler.rb:122:in `require'
W:/RubymineProjects/blog/config/application.rb:7:in `<top
(required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/
custom_require.rb:36:in `require'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/site_ruby/1.9.1/rubygems/
custom_require.rb:36:in `require'
W:/RubymineProjects/blog/Rakefile:5:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/rake_module.rb:25:in `load'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/rake_module.rb:25:in `load_rakefile'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:501:in `raw_load_rakefile'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:82:in `block in load_rakefile'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:133:in `standard_exception_handling'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:81:in `load_rakefile'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:65:in `block in run'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:133:in `standard_exception_handling'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/
rake/application.rb:63:in `run'
W:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/bin/
rake:33:in `<top (required)>'
W:/RailsInstaller/Ruby1.9.2/bin/rake:19:in `load'
W:/RailsInstaller/Ruby1.9.2/bin/rake:19:in `<main>'
I tried "gem install execjs" and "therubyracer". No change. I tried
reinstalling Ruby, then Rails. No change. I tried adding them to my
Gemfile and bundle install but it fails at "therubyracer" What could I
have possibly done? Is it really as fragile as it seems or did I just
make a terrible mistake?

I'm new so I just can't figure out what's going on here. I was going
through a tutorial to learn the ins and outs of Rails and then it just
stopped working.

I'm running RubyMine on Windows for now. Here are the errors:
[rake --tasks] rake aborted!
Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs
for a list of available runtimes.

<<<snip>>>

Yeah, I googled it and came across that link before posting. I thought that would be obvious.

Gemfile and bundle install but it fails at “therubyracer”

It seems that after giving up and rebooting the next day the problem was alleviated. What’s google say now?

Yeah, I googled it and came across that link before posting. I thought that would be obvious.
Gemfile and bundle install but it fails at "therubyracer"

It seems that after giving up and rebooting the next day the problem was alleviated. What's google say now?

I had the same problem I am using Rails 4.2.3 and ruby 2.1.2. I found
that therubyracer gem install install "V8" The version of V8 was not
compatible with my gcc version 4.2. I had to use an older gem (0.11.0)
to get it to bundle properly.