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

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

Learn how to change the refresh rate for your display in Windows to determine how smoothly motion appears on your screen.

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

请执行以下任一操作： 在 “翻译为 ”下拉列表中，选择要将页面翻译成的语言。 默认值是为Microsoft Edge设置的语言。

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

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

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

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

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。