I dunno whats gone wrong with it but yesterday night I was downloading Bad Company 2 Multiplayer Demo and it was working but when I went on Playstation Store it just froze and now my PS3 Wont start up anymore. Whats happened?

BTW don't say Xbox 360s better and say buy a XBOX 360, because No offense a Xbox 360 Sucks to me, why? need to play Online.