Stony Stevenson writes "Vista is proving far less popular than XP did with new PC buyers during the earlier OS's first year on the market. This conclusion follows from statements by Bill Gates at this week's Consumer Electronics Show. Gates boasted that Microsoft has sold more than 100 million copies of Windows Vista since the OS launched last January. Based on Gates's statement, Windows Vista was aboard just 39% of the PC's that shipped in 2007. And Vista, in terms of units shipped, only outperformed first-year sales of XP by 10%, according to Gates's numbers, while PC shipments have doubled in the years since XP's release."