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

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Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.

Learn how to use drag and drop to transfer content between your Android device and PC.

Learn about Windows 11 minimum system requirements and how to assess your upgrade eligibility.

Learn how to access and manage your Windows sign in options. Use a password, Windows Hello, or a security key to unlock your device.

Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

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。

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

Updates to the default screen and sleep settings now help you use energy more efficiently and extend battery life. You can find efficiency settings in Windows 11 at Settings > System > Power & battery.. For a guided walkthrough of how each of the power and battery settings can improve your device's performance, click the button to open the Get Help app: