13%the drop in sales of Windows computers between the last week of October and the first week in December, compared to sales from one year ago. This is a bad sign for Microsoft, which launched Windows 8 during that time frame, and one blamed on various factors, including the bold design changes in the OS and the rise of the mobile market, which could be slowing down demand for desktops. The Surface, which was only for sale in Microsoft stores during that period, was likely a non-factor. source
