若要检查更新，请选择“ 开始 > 设置 > Windows 更新 ”，然后选择“ 检查更新 ”。. 如果有可用的更新，可以选择安装它们。. 如果在更新设备时遇到问题（包括以前的主要更新出现问题），请参阅 排查更新 Windows 问题 中的常见修补程序。. 如果Windows 更新警告你 ...

PowerPoint: Insert, select Symbols > Symbol. The Symbols button is on the far right end of the Insert toolbar tab. In the Font box, select Wingdings. In the Character code box at the bottom, enter: 252. In the grid of symbols, the check mark is selected. Another check-mark option is available two squares away from it (character code 254).

使用 VLOOKUP 存在一些限制，即 VLOOKUP 函数只能从左到右查找值。. 这意味着包含查找值的列应始终位于包含返回值列的左侧。. 现在，如果电子表格不是以这种方式生成，则不要使用 VLOOKUP。. 可以使用 INDEX 和 MATCH 组合函数代替。. 此示例显示了一个小列表，其中 ...

Download the latest Windows update from the Windows Update page in Settings for your device when it becomes available.

Learn how to sign into your PC with Windows Hello using a PIN, facial recognition, or fingerprint.

Download pre-built Excel calendar templates. Stay organized with a variety of Excel calendar layouts and templates you can easily adapt to your needs.

Use automatic (Out of Office) replies from Outlook to tell people you won't be responding right away to their email messages.

Anmelden bei Hotmail oder Outlook.com. Hotmail ist jetzt Outlook.com. Um sich bei Hotmail anzumelden, benötigen Sie den Benutzernamen und das Kennwort für Ihr Microsoft-Konto. Wählen Sie bei der Anmeldung Ja bei der Frage "Angemeldet bleiben?", wenn Sie beim nächsten Mal direkt zu Ihrem Postfach gehen möchten (nicht empfohlen für ...

Use the DATEDIF function when you want to calculate the difference between two dates. First put a start date in a cell, and an end date in another. Then type a formula like one of the following.

Find answers to frequently asked questions about Office 2021 and Office LTSC for Windows and Mac on the official support page.