Computer Won't Start Up

We just bought a Lenovo k450e i5 desktop and just started using it yesterday night. First time we started it up wondows 8 loaded, set up the pc, could browse the internet and everything worked. This morning i tried getting on and it boots up, loads the black screen with Lenovo on it, disappears and freezes and just a blank blue screen. I've tried shift and f8 and it won't even load safe mode. Pc is brand new, Help!