If your download does not start after 30 seconds,
1) Download the appropriate SDK msi installer(s) on to your workstation based on processor architecture, run it, and the installer will walk you through the setup process.
2) If you are developing applications that interact with the job scheduler you will also need to install the HPC Pack 2012 Client utilities.
3) (optional) Download any of the supplements / sample code archives and extract the contents of the zip file to your hard drive.
4) (optional) If you are developing MPI applications you will also need to install the HPC Pack 2012 MS-MPI redistributable.