First you have to download the game. It can be found here
. You may notice how fast it downloads. N is a tiny
file. It's best just to put it in your desktop. Now look at your desktop, and you'll see a ZIP file called n_v1pc. Create folder and name something you'll remember, like N, and dump n_v1pc into it. Now click on the folder and extract everything. Get this right. You need to right click and hit "Extract All." Now, whenever you want to play it, you have to open that folder and n_v14 (it has a gray icon), which shows up after extraction. Now you're ready to play.