It's your first stay in Louvain-la-Neuve? Take a look at this little video (5 min). David shows you the main places where you'll have to go to carry out your first formalities.
You can also download this video so you'll have it with you when you arrive.
Please note: since this video was shot, the Student Office changed name. The new name is Office of the Registrar.
Also check our web pages "First steps as a degree student" and "First steps as an exchange student"