The 20 Worst Windows Features of All Time

Transparent Windows borders! That let you see the stuff beneath them! The Aero user interface, which Microsoft touted as one of the major breakthroughs in Windows Vista, are (mildly) cool when they work as advertised. But the upside of Aero seems tiny given the hardware oomph required: For PCs with less-than-potent graphics (including ones on sale today), Aero is a machine-choking headache. In fact, Vista sometimes decides on its own to turn off Aero without telling you. Don?t worry--you're really not missing much.