Here's a simple how-to: http://aeynasshi.blogspot.com/2013/01/how-to-setup-korean-language-in-windows.html - it's easy! And once you're done, you'll be able to toggle between English and Korean keyboards by hitting the "alt" key. Be sure to print that image at the end - it is very useful until you have learned where the keys are.

First of all you should add Korean language to your keyboard, from Control Panel. And then, you can use On-scree Keyboard for typing ( by mouse ). After some time of typing, you can memorize the letters' places and type them directly by your keyboard. This is how you can type without having Korean keyboard ( which I did too! ) And if you like, you can write letters ( according to On-screen keyboard ) on your keyboard by a polish or pen!! The easiest way to get a Korean keyboard!