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。

Hotmail est maintenant Outlook.com. Découvrez comment vous connecter pour accéder à votre compte de messagerie Outlook.com, Hotmail, Live ou MSN.

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

Learn how to use Remote Desktop in Windows. On your Windows, Android, or iOS device: Open the Remote Desktop app (available for free from Microsoft Store, Google Play, and the Mac App Store), and add the name of the PC that you want to connect to (from Step 1). Select the remote PC name that you added, and then wait for the connection to complete.

System requirements and setup steps for the Phone Link app

Learn how to access Windows device security settings in Windows Security to help protect your device from malicious software.

Learn how to turn on device encryption, or standard BitLocker encryption in Windows.

Learn why it's important to have a backup, and how Windows Backup can help you keep your files and settings safe.

Get help and support for Microsoft Edge. Find Microsoft Edge support content, how-to articles, tutorials, and more.

Learn how to use antivirus protection in Windows Security to protect your Windows PC against malware, viruses, and other threats.