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。

Learn how to change settings to enable Secure Boot if you are not able to upgrade to Windows 11 because your PC is not currently Secure Boot capable.

了解如何从 Windows 10 家庭版升级到 Windows 10 专业版或从 Windows 11 家庭版升级到 Windows 11 专业版，包括如何使用有效产品密钥或 Microsoft Store。

Get help and support for Microsoft Edge. Find Microsoft Edge support content, how-to articles, tutorials, and more.

Get Microsoft 365 support, help, and learning resources. Organize your life, expand your creativity, and protect what’s important with Microsoft 365.

Learn how to download and customize Windows Media Player. Get troubleshooting help and how-to information for Windows Media Player 12.

How to get service or repair for Surface To get service for a personal Surface device (not a business device), you can send it in to get quality service performed by trusted experts using certified parts. You’ll be back up and creating your best work on your Surface.

Learn how to contact Microsoft Store support to get help for your payment and billing issue.

从设备中删除Windows Hello和任何关联的生物识别数据. 转到 “开始 > 设置” > 帐户 > 登录选项 。. 选择要删除Windows Hello方法。. 选择“ 删除”。. 你的生物识别数据将保留在你的设备上，直到你将其删除。. 但是，在长时间Windows Hello处于非活动状态后，系统会提示 ...

To set an automatic reply for contacts outside your company, select Outside My Organization > Auto-reply to people outside my organization, type in a message, and select OK. The OK button may be missing because of certain screen solution and scaling settings. To resolve this issue, you can adjust the screen resolution and scaling settings, or use a large monitor.