Erfahren Sie, wie Sie einen Windows-Product Key für die Aktivierung finden und wann Sie stattdessen eine digitale Lizenz verwenden.

了解如何從 Windows 10 家用版升級至 Windows 10 專業版或從 Windows 11 家用版升級至 Windows 11 專業版，包括如何使用有效的產品金鑰或 Microsoft Store。

This article is for Outlook.com. If you're using Outlook for Windows, see Fixes or workarounds for recent issues in Outlook for Windows.. If you're having problems accessing Outlook.com, you can see the status of Microsoft Office Online Services at the Service Health portal.. If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues.

Lists all Excel functions by their category, such as Logical functions or Text functions.

下面将了解如何在 蓝牙 11 中打开Windows关闭： 执行以下操作之一： 在任务栏上，选择"网络 " 图标。 选择蓝牙快速设置以将其打开或关闭。

Learn how to activate Windows using an internet connection, automated system, or live support advocate.

Get answers to all of your Microsoft Word questions. Find Word help, how-to articles, training videos, tutorials, and more.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Training: Watch and learn how to use Outlook to recall and/or replace an email in Outlook if all your recipients are using Microsoft Exchange.

Go to Settings > Apps > Apps & features to change whether you're shown app recommendations when trying to install apps from outside the Store.