Microsoft’s Windows Phone 8.1, the first major update to the Windows Phone mobile operating system, introduces a virtual personal assistant named Cortana, several cool design tweaks, and a host of new ...

Microsoft formally unveiled Windows Phone 8.1 Update early Wednesday morning, confirming features such as Start screen folders, sandboxed apps, and even a handy VPN function for surfing over public Wi ...

At its Build 2014 conference today, Microsoft unveiled Windows Phone 8.1. Among the new features is a personal digital assistant named Cortana, a new Action Center, as well as support for customizable ...

Microsoft has begun accepting applcations to the Windows Phone SDK 8.0 developer preview program, enabling developers to begin optimising existing Windows Phone apps for the new OS. The firm claims ...

如图，已经重启过了，不管用，电脑也安装了最新的更新，专业版8.1正版，求帮助 ...