Windows 8.1 Update and Windows RT 8.1 Update (also known as KB 2919355) include improvements that make your favorite apps and settings easier to find and use, provide more familiar mouse and keyboard options, and update security and performance.Here’s what you need to know about installing this important update. Check to see if it’s already installed

Use the OneDrive mobile app to backup your phone's camera roll to Microsoft OneDrive. Note that it does not sync photos - it's a one-time upload. This means that once OneDrive has your camera roll, you can delete photos and videos from your device, freeing up valuable space, and the copies in OneDrive won't be affected.

Microsoft Edge 是 Microsoft 推荐的浏览器. Windows 8.1不再支持 Internet Explorer 11。 相反，我们建议切换到 Microsoft Edge。 Microsoft Edge 是为了给你带来最好的上网体验而建立的，让你在浏览网页时有更多自主性，并获得更多隐私保护。

了解如何使用 Android、iOS 或 Windows 设备在 Xbox 上玩云游戏。

Why some files won't open in Internet Explorer. Internet Explorer uses add-ons such as Adobe Reader to view some files in the browser. If a file that needs an add-on won't open, you might have an older version of the add-on, which needs to be updated.

Prevents Windows Update from performing driver installations and sending restart notifications; Helps achieve a more stable frame rate depending on the specific game and system

了解如何使用 Android、iOS 或 Windows 设备在 Xbox 上玩云游戏。

解决常见的激活问题. 若要使用疑难解答， 请选择">设置> 激活>" ，然后选择"疑难解答" 。 打开"疑难解答"设置

In the snapshot, you'll be able to see the annotations over the screen that was being shared when the snapshot was taken. Select annotations to make changes to them.

If you want to make a different console your home Xbox: Press the Xbox button on your controller to open the guide.; Select Profile & system > Settings > General > Personalization, and then select My home Xbox.; Do either of the following to change the status of your console: To make this your home Xbox, select Make this my home Xbox.; To remove this console as your home Xbox, select Make this ...