comp booted as new/nothing in start menu

Hi, i have a brand new store bought hp g6 laptop running windows 8, it has been running quite well for the last few days. However, today I have come to boot up the comp and it has shown a 'setting up your comp/downloading tiles' screen, basically looking like i was turning it on for the first time. Now, when i log in to my profile it is completely empty, there is nothing there, when i click...