System requirements and setup steps for the Phone Link app

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

How to add a signature to your Word documents. You can also use the Signature Line command in Word to insert a line to show where to sign a document.

Learn how to use Remote Desktop in Windows. On your Windows, Android, or iOS device: Open the Remote Desktop app (available for free from Microsoft Store, Google Play, and the Mac App Store), and add the name of the PC that you want to connect to (from Step 1). Select the remote PC name that you added, and then wait for the connection to complete.

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。

Windows Security is pre-installed on Windows 10 and ready for you to use at any time.

Learn how to change the power mode on your Windows PC to preserve your battery, limit notifications, and background activity.

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

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

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