As of 2015, install "Minecraft" for PC after you download the correct file from Minecraft.net. The installer software takes you through the process of the install, and the program creates a shortcut within your computer's hard drive. You must have an Internet connection when you first download the game; otherwise, it does not work properly. Before installing the game, you have to buy the latest version and create a Mojang account.
Mojang suggests downloading "Minecraft" through Google Chrome or Mozilla Firefox. Register with Mojang and create an account using an email address before downloading the game files; that way, Mojang knows what version of the game you have. Every time you run the game while you have an Internet connection, the game automatically updates itself through your account. Once the download completes, you may play offline.
To start the download process, input the code from your "Minecraft" game purchase through your Mojang account. Register the account with an email, password, date of birth and terms of service acceptance. Buy the game on Minecraft.net, or use a prepaid card found in many national retailers. Run the demo version if you want to try out the game before buying it.
"Minecraft" needs Java to run, so make sure you have the latest version of Java operating on your computer. Mojang suggests having only one version of Java on your computer, as multiple versions may cause the game to fail.