First of all, be sure of having at least 3 GB OF DEDICATED RAM and 2 GB OF FREE SPACE on file system!
1. Download the JDK (1.8 version or following)
2. Install and set up correctly the JDK (How-to-InstallConfigure-JDK-WIN)
3. Carefully read the Installer (environment prerequisites and instructions)
4. Download the installer and follow the guided process