Important: If your device is out of support, it is no longer receiving security updates from Microsoft and may become more vulnerable to security risks and viruses.Therefore, we strongly recommend that you update to the latest version of Windows. Each version of Windows is supported for 18 months.

若要访问登录选项，请依次转到“开始” > “设置” > “帐户” > “登录选项”。 或者直接单击此按钮： 转到“登录选项” 更改或管理密码或 PIN. 若要更改密码或 PIN，请转到“开始 > 设置> 帐户 ”> 登录选项。. 选择“PIN (Windows Hello)”，然后选择“更改 PIN”。

Battery Life: Lowering your refresh rate can save battery power by reducing the amount of energy your display consumes.This can be useful when you are using a laptop or tablet and want to extend your battery life.

Organize your ideas. Collections help you keep track of your ideas on the web - shopping, planning a trip, research, or just want to pick up where you left off.

Windows 11 automatically downloads and installs updates to make sure your device is secure and up to date. This means you receive the latest fixes and security updates, helping your device run efficiently and stay protected.

Learn how to log in to Microsoft Teams with your Microsoft 365 account. This step-by-step guide from Microsoft Support walks you through the process of accessing Teams on desktop, web, and mobile devices.

Get help with your questions about Microsoft Teams from our how-to articles, tutorials, and support content.

You can insert the current date and time in an Excel cell as static values or as dynamic values. A static value is one that doesn’t change when the worksheet is recalculated or opened. A dynamic value is one that is updated each time formulas are recalculated.

Get help with Outlook for Windows, the Outlook app, Outlook.com, and more. Find training videos, how-to articles, and Outlook support content.

Si vous rencontrez des problèmes de son ou audio, les suggestions suivantes peuvent vous aider. Ces conseils sont affichés dans l’ordre. Commencez par le premier de la liste ; s’il ne vous permet pas de résoudre votre problème, passez au suivant.