Important: You don't need to remove old security information unless there is an account security risk (e.g. someone else has access to your old mailbox).

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。

新しい Windows 10 PC にプリインストールされている Office をライセンス認証する、または新しいプロダクト キーを使用する方法について説明します。

To edit a PDF, open it in Word. This works best with PDFs that are mostly text. PDFs of book chapters or something that looks like a manuscript from a copier won't be formatted well in Word.

还可以转到电子邮件通知中的"浏览组"部分，查看对话以及组的日历和文件。 你创建的或受邀加入的所有组位于左侧导航栏的“组”下。单击组名称即可访问任何组。

Here's how to show icons, hide them, or change their size in Windows. To show or hide desktop icons. Right-click (or press and hold) the desktop, point to View, and then select Show desktop icons to add or clear the check mark.

In the search box on the taskbar, type Create a restore point, and select it from the list of results.

Microsoft Defender is a security app that helps people and families stay safer online with malware protection, web protection, real-time security notifications, and security tips.Microsoft Defender is included in a Microsoft 365 Family or Personal subscription and works on your phone (Android or iOS), PC, and Mac.

Option. Description. Microsoft Exchange Server. If Outlook cannot automatically detect your Exchange server, you can enter its address here. To find out the name of your Exchange server, you have to contact the person who gave you the email address, or contact someone in your IT department, for the name of your Exchange server.

On the Choose an account screen, click the Microsoft account button.; On the Add your Microsoft account screen, enter the email address and password associated with your Microsoft account.; On the Make it yours screen, you'll have the option to make this Microsoft account your primary account. (This makes sign-in, settings, and syncing happen automatically for all other Microsoft services.)