若要将其关闭，请将设置切换为“关闭”。 关闭 Microsoft Defender 防火墙可能会使设备（以及网络，如果有）更容易受到未经授权的访问。

在 Windows 8.1 或 Windows RT 8.1 中查找操作系统信息. 要查找设备运行的 Windows 版本，请按 Windows 徽标键 键 + R，并在“打开”框中键入“winver”，然后选择“确定”。. 如果你的设备运行的是 Windows 8.1 或 Windows RT 8.1，那么有关详细信息，可以参阅以下内容：

Summary. The first hours of a newly installed Windows deployment can leave the system vulnerable because of a Microsoft Defender protection gap.

Find guidance for all things family at Microsoft. Learn about Family Safety, find resources to support your child at school, and get the latest on keeping your information and devices secure.

Devices running Windows 11 version 22H2 and older. If you're running Windows 11 version 22H2 and older, Windows 10, Windows 8.1, Windows 7 or any other earlier OS version, your device will not be affected by the MSDT Troubleshooter retirement.

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

Focus is a new feature in Windows 11 that helps you minimize distractions. To help you stay on track, it integrates with the Clock app with features like a focus timer and music integration.

With cameo, you can insert your live camera feed directly on a PowerPoint slide.You can then apply the same effects to your camera feed as you can to a picture or other object, including formatting, transitions, and styles.

We're continuously improving the experience in Kids Mode to make it the best place for Kids to explore the web. If you have any feedback, go to Settings and more menu > Help and feedback > Send feedback.

Use the Xbox Accessories app to configure your controller or headset for your preferred gaming experience.