安装 Windows 11. 在针对你的特定电脑测试和验证 Windows 11 升级后，Windows 更新将指示它已准备好安装。 若要检查 Windows 11 是否已为你的设备准备就绪，请转到“开始” “设置” >“更新和安全性” >“Windows 更新” ，然后选择“检查更新”。 如果升级适用于你的设备，并且想要继续，请下载并安装它。

In Outlook, you have the option to: Attach a file | Upload a locally saved file to your OneDrive | Insert a picture into the body of a message | Attach an email item | Solve problems with attachments. Attach a file to an email message in new Outlook. New Outlook keeps track of the files you have worked on recently and suggests them whenever you decide you want to attach a file to an email message.

The classic cold-call scam. The scammers call you and claim to be from the tech support team of Microsoft or another company. They offer to help solve your computer "problems".

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。

The array form of LOOKUP looks in the first row or column of an array for the specified value and returns a value from the same position in the last row or column of the array. Use this form of LOOKUP when the values that you want to match are in the first row or column of the array.. Syntax. LOOKUP(lookup_value, array) The LOOKUP function array form syntax has these arguments:

To add another account to OneDrive on your computer. If you already have a personal OneDrive account set up, you can only add work or school accounts.

Important: Workbook links are considered potentially unsafe and must be enabled when you open a formula workbook.When you open a formula workbook, click Enable Content in the Message Bar to allow the workbook links to function. If you don't, Excel keeps the most recent values and disables refreshing the links with values from the data workbook.

At Microsoft, we're guided by our AI principles, our Responsible AI Standard, and decades of research on AI, grounding, and privacy-preserving machine learning.Data privacy and security is a key principle of responsible AI. We aim to help our customers use our AI products responsibly, sharing our learnings, and building trust-based partnerships.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

メールまたテキスト メッセージで、お使いのアカウントへの不審なサインインの警告を受信した場合で、アカウントに最近特に何もしていない場合には、次の手順でアカウントのセキュリティを確認します。