Learn how to access, share, or clear your Microsoft search history through the privacy dashboard.

Teams in Microsoft Teams are collections of people, content, and tools surrounding different projects and jobs.

学习如何在 Windows 中解决 USB-C 问题，修复 USB 设备、端口和适配器无法正常工作。

Get started with Microsoft Teams (free). Explore your options, find out what’s new, browse help topics, and more.

Summary. This security update makes improvements to Secure Boot DBX for the supported Windows versions listed in the "Applies to" section. Key changes include the following:

Learn how to receive a refund or exchange for items purchased from Microsoft.

Get help with Skype for Business. Skype for Business 2016 Training. Video: What is Skype for Business? Video: Download and install Skype for Business (video)

Learn how to check for, download, and install KB 2919355, an update for Windows 8.1 and Windows RT 8.1.

Learn how to add threaded comments and notes to cells in your Excel worksheet.

Learn more about what background apps are in Windows and how to turn them off when you're not using them.