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

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

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 locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.

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

Microsoft's products and services work best if you use the same language and region across all your devices, and in all of your app and Store settings.

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

Learn how to record Teams meeting. Capture audio, video, screen sharing activity, and troubleshoot recordings in Microsoft Teams.

Learn how to reinstall Windows on your PC and how activation works after it's installed.

Learn about what effect closing a Microsoft account might have on your other apps and services.