How to use the COUNTIF function in Excel to count the number of cells that meet values you set.

Get an overview of SharePoint. Learn about sites, lists and libraries, permissions, content types and workflows. In addition, read about some of the social features in SharePoint.

Learn how to switch out of S mode to install apps from outside of the Microsoft Store or to upgrade to Windows 11.

Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.

Change your password with your email provider. See the following sections for instructions on changing your email account password for several major email providers.

了解如何使用 PIN、面部识别或指纹通过 Windows Hello 登录电脑。

Learn how to redeem a Microsoft/Xbox gift card or other code on your mobile device, Windows device, or Xbox console.

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

The new Microsoft Edge helps you browse, search, shop online, and more. Like all modern browsers, Microsoft Edge lets you collect and store specific data on your device, like cookies, and lets you send information to us, like browsing history, to make the experience as rich, fast, and personal as possible.

If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.