With Windows 8, Microsoft completely reimagined the graphical user interface for its operating system, which now runs on both desktop PCs and tablets, but the overhaul was not without hitches and its dueling UIs (one designed for touch, the other for keyboards and mice) created significant confusion for users. Windows 10 (a free update to users of Windows 8 or Windows 7) fixes a number of the problems introduced by the revolution in Windows 8 and...