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

Choose from a variety of Surface devices and accessories to get help.

通过 Wi-Fi 与其他设备共享 Internet 连接，将 Windows 电脑变成移动热点。 你可以共享 WLAN、以太网或手机网络数据连接。

Erfahren Sie, wie Sie die Windows Update-Problembehandlung ausführen, um Fehler beim Herunterladen oder Installieren von Windows zu beheben.

To change your capture settings, press the Start button , and then select Settings > Gaming > Captures.The following sections cover the capture settings you can adjust.

Discover the latest updates for Windows 10, including improvements and fixes, known issues, and guidance on how to get the update.

Sign in using two-step verification or security info; Create app passwords in Security info (preview) Set up a phone call as your verification method

New to Xbox gaming on PC? Here's how to get started.

注意: 在Windows中获取驱动程序更新的最佳和最安全的方法始终是通过Windows 更新。如果在Windows 更新时遇到问题，则可能会看到 Update Windows 中的任何链接是否可帮助你先解决问题。

If you accidentally delete a file or folder in OneDrive, you may be able to recover it later from the OneDrive recycle bin.. For info about restoring a SharePoint file or folder, see how to restore items from the SharePoint recycle bin.For info about restoring SharePoint files stored in OneDrive, see Restore a previous version of a file in OneDrive.