Microsoft has been on a roll lately. Office for iOS (and soon Android), free Windows licenses for small devices, universal Windows and Windows Phone apps, Siri rival Cortana, even a promise to eventually return the start menu before Windows 9. But when it comes to Windows 8, it seems the company has a permanently loaded pistol aimed squarely at its feet. So it fits that just one week on from the launch of “Windows 8.1 Update 1” (the smart upgrade mouse and keyboard users have long awaited) stupidity would strike once again. “Windows 8.1 Update is a cumulative update to...