Find everything you need to manage your Xbox account, profile, and more.

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

本文介绍如何在 Windows 8.1、Windows 8、Windows 7 或 Windows Vista 中使用系统文件检查器工具来解决丢失或损坏的系统文件的问题。

Find out how to identify and manage different file types in Windows with File Explorer and common extensions.

If your Surface touchscreen doesn’t work, try these steps first. To try to resolve these issues, you can begin by following the steps below to boot to UEFI and test touch functionality, reinstall the touchscreen driver, check for Windows and Surface updates, or reset Surface.. If that doesn't resolve the issues, you can find more info in Is your touchscreen still not working?.

Get help with your questions about Microsoft Teams from our how-to articles, tutorials, and support content.

Instead of using a calculator, use Microsoft Excel to do the math! You can enter simple formulas to add, divide, multiply, and subtract two or more numeric values.

Find answers to common questions about genuine Windows software.

Erfahren Sie, wie Sie Windows mithilfe von Tastenkombinationen navigieren. Hier finden Sie eine vollständige Liste der Taskleisten-, Eingabeaufforderungs- und allgemeinen Windows-Tastenkombinationen.

Training: With SharePoint Online, build intranet sites, create team or communication sites, find and follow news, and more. Watch this video to learn how.