Boot up your server with the USB key or a CD-ROM inserted, and select it as bootable device by pressing one of the following keys (hardware specific): ```<ESC>```, ```<F8>```, ```<F10>```, ```<F11>```, ```<F12>``` ou ```<SUPPR>```
Select "Graphical Install" and follow the instructions. You get to choose the system language and keyboard layout, then you must confirm the full formating of the hard drive.
The installation process will run on itself, automatically downloading the required packages.
If this step is not successful, you probably have a connection problem. Check that your Internet connection is working.