Learn what you can do if you're not receiving account aign-in verification codes.

Learn how to tell if your Office software is genuine. To help determine if your Microsoft software is genuine, go to our How to Tell site for more information. Here you'll learn about authentic packaging, including what to look for with product key labels, and Certificate of Authenticity (COA), how to report counterfeit software, and find out what your shopping and licensing options are.

Get to know your way around Windows 11, from where to search to how to stay organized. Watch the video and read tips about new features.

Microsoft Rewards offers and redemption catalogs vary across regions. The following is a list of countries/regions in which Microsoft Rewards is currently available:

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.

了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。

You can refer to the contents of cells in another workbook by creating an external reference formula. An external reference (also called a link) is a reference to a cell or range on a worksheet in another Excel workbook, or a reference to a defined name in another workbook.

You can choose which apps will start automatically when you start your device.

Find out how to use Game Bar to capture game play, chat with friends, track achievements, and more.

Learn why it's important to have a backup, and how Windows Backup can help you keep your files and settings safe.