Learn what PivotTable and PivotCharts are, how you can use them to summarize and analyze your data in Excel, and become familiar with the PivotTable- and PivotChart-specific elements and terms.

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。

Get tips for how to set up and test microphones in Windows.

Having a backup copy of your BitLocker recovery key helps to prevent serious issues later. It takes less than a minute to back up your key and this article will show you how.

While setting up the Phone Link app, you'll be prompted to enable access to your phone's messages.

Find out more about Xbox digital codes and gift cards, and how to troubleshoot issues redeeming content.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

How to access your Microsoft account? If you have confirmed that your email is a Microsoft account, you can access it by following these steps:

The TEXT function lets you change the way a number appears by applying formatting to it with format codes.It's useful in situations where you want to display numbers in a more readable format, or you want to combine numbers with text or symbols.

Learn how to run Windows Update Troubleshooter to resolve errors downloading or installing Windows updates.