Learn new and useful keyboard features, tips, and tricks for Windows with this overview from Microsoft Support.

Learn how to troubleshoot and fix problems setting up your email in Outlook.

了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。

Find out how to set up and manage your security info and verification codes for your Microsoft account, and troubleshoot common issues.

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

When you back up your files, apps, and settings in the cloud using your Microsoft account, you get 5 GB of free cloud storage and other benefits that protect your files with the latest security and make everyday tasks easier.

Windows Security is pre-installed on Windows 10 and ready for you to use at any time.

Extensions, or add-ons, are simple tools that customize your browser experience and offer you more control. Here's how to add, turn off, and remove them in Microsoft Edge .

Learn how to locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.

Learn how to get ready for the Windows 11 upgrade, from making sure your device can run Windows 11 to backing up your files and installing Windows 11.