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Learn about Windows 11 minimum system requirements and how to assess your upgrade eligibility.

Use the Office offline installer to install Office 2016 or Office 2013 if you don't have an active Internet connection or you're having problems with slow speed or unreliable connections.

Applies To: Office 2021, Office 2019, Office 2016, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Small Business Admin, Office 365 operated by 21Vianet - Admin, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin

Create an alias to give you an additional email address which uses the same inbox, contact list, and account settings as your primary email address in Outlook.com.

Applies To: Outlook.com

Learn how to reset or change your Microsoft account password. Get help with a forgotten Microsoft account password.

Applies To: Microsoft account dashboard

Microsoft Support offers assistance for Microsoft products, including how-to articles, videos, and training for various software and devices.

Learn how to access and manage your Windows sign in options. Use a password, Windows Hello, or a security key to unlock your device.

如何将 IF 函数 (与 Excel 中) AND、OR 和 NOT 函数结合使用，以在给定值之间进行逻辑比较。

Applies To: Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016, Excel Web App, Excel for Windows Phone 10

Learn how to update Windows to ensure your device operates smoothly and securely with the latest features.

Learn how to set up Microsoft Family Safety to manage screen time, filter content, and share location with your family members.

Applies To: Microsoft Family Safety

获取 Windows 操作系统的官方支持和帮助信息，以及如何使用 Windows 的指南。