App permissions - Microsoft Support
Learn how to locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.
在 Windows 中查找 BitLocker 恢复密钥 - Microsoft 支持
了解在 Windows 中查找 BitLocker 恢复密钥的不同方法，并了解如何在系统上激活 BitLocker。
All about Xbox Game Pass Ultimate | Xbox Support
Xbox Game Pass Ultimate includes all Game Pass benefits, including more than 100 high-quality console and PC games. New games are added all the time, so there’s always something new to play.
How to get support for Outlook.com - Microsoft Support
If you need help with Outlook.com, you can read our self-help content, or get support via email.
Applies To:
Outlook.com
Free up drive space in Windows - Microsoft Support
Find out how to free up space on your device by deleting unnecessary files, uninstalling apps, and moving files to other drives.
Get Windows Media Player - Microsoft Support
Learn how to get Windows Media Player 12 for Windows 10, Windows 8.1, and Windows 7.
Language packs for Windows - Microsoft Support
Learn how to download, install, and configure additional language packs for your version of Windows.
在 Excel 中将 IF 与 AND、OR 和 NOT 函数配合使用 - Microsoft 支持
在 Excel 中，IF 函数允许通过测试某个条件并返回结果（如果该条件为 True 或 False），在值和预期值之间进行逻辑比较。
Applies To:
Excel for Microsoft 365, Excel for Microsoft 365 for Mac, Excel for the web, Excel 2021, Excel 2021 for Mac, Excel 2019, Excel 2019 for Mac, Excel 2016, Excel Web App, Excel for Windows Phone 10
Activate Office - Microsoft Support
Learn how to activate Office pre-installed on new Windows 10 PCs or with a new product key.
Applies To:
Excel for Microsoft 365, Word for Microsoft 365, Outlook for Microsoft 365, PowerPoint for Microsoft 365, Access for Microsoft 365, OneNote for Microsoft 365, Publisher for Microsoft 365, Visio Plan 2, Excel 2021, Word 2021, Outlook 2021, PowerPoint 2021, Access 2021, Project Standard 2021, Publisher 2021, Visio Professional 2021, Visio Standard 2021, Office 2021, OneNote 2021, Excel 2019, Word 2019, Outlook 2019, PowerPoint 2019, Access 2019, Project Standard 2019, Publisher 2019, Visio Professional 2019, Visio Standard 2019, Office 2019, Excel 2016, Word 2016, Outlook 2016, PowerPoint 2016, Access 2016, OneNote 2016, Publisher 2016, Office 2016, Microsoft 365 for home, Office for business, Microsoft 365 admin, Project for Office 365
Import your favorites in Microsoft Edge - Microsoft Support
Import favorites on Windows 10 or Mac Import from a browser. Open Microsoft Edge and select Settings and more .