Get the steps for turning Windows Defender Firewall on or off.

Get help with Outlook for Windows, the Outlook app, Outlook.com, and more. Find training videos, how-to articles, and Outlook support content.

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

Learn how to activate Windows using an internet connection, automated system, or live support advocate.

了解如何从“设置”、登录屏幕和黑屏或空白屏幕启动到 Windows 中的安全模式。

Use multiple desktops in Windows to organize projects, or quickly switch between desktops before a meeting.

Learn how to troubleshoot USB-C problems in Windows and fix USB devices, ports, and adapters not working properly.

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。

Get help for the account you use with Microsoft. Find how to set up Microsoft account, protect it, and use it to manage your services and subscriptions.

检查你的版本. DirectX 是许多 Windows 游戏都需要的一种多媒体技术套件。 如果你的电脑未安装正确版本的 DirectX（产品包装盒上应标有所需的版本），游戏可能无法正常运行。