Microsoft's recent "I'm a PC" advert is pretty annoying on several levels. First of all I must admit to being a PC - "I'm a PC and I use Ubuntu" - just not quite in the way they mean it.
Secondly is the appearance of the spiritualist-medic Deepak Chopra. That's almost more annoying than writing HTML for Internet Explorer 6!
Also "Life without walls" - no walls, no need for Windows!