Quick Assist lets someone you trust take over your Windows 10 or Windows 11 PC and fix a problem from wherever they are.

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。

If either of the categories above apply to you, use the following procedures to update your browser: Update once. In the browser, go to Settings and more > Help and feedback > About Microsoft Edge (edge://settings/help).. If the About page shows Microsoft Edge is up to date., you don't need to do anything.

Learn how to use a health report in Windows Security to manage your device performance and keep your device secure.

Learn how to get Microsoft Store updates for your apps and games. Download the latest versions of Microsoft Store apps and games.

了解如何使用别名更改 Microsoft 帐户电子邮件地址或电话号码以登录到 Microsoft 帐户。

Use the status bar for simple counting in Excel, or use functions to count cells that contain data, are blank, or meet specific conditions or multiple criteria.

Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.

Learn how to change the power mode on your Windows PC to preserve your battery, limit notifications, and background activity.

See how to arrange all your open windows using the mouse, keyboard, or the Snap Assist feature in Windows.