Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2

To turn it off, switch the setting to Off.. Turning off Microsoft Defender Firewall could make your device (and network, if you have one) more vulnerable to unauthorized access.

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

Xbox Support offers help for Xbox, Game Pass, and billing questions. Get advice and customer service in the Xbox Support community.

Change your password with your email provider. See the following sections for instructions on changing your email account password for several major email providers.

Learn how to turn on device encryption, or standard BitLocker encryption in Windows.

了解如何添加新的 Xbox 好友，以便快速在线找到他们，为你的下一场游戏冒险做好准备。

When you’re connected to the internet and using a proxy server while browsing the web, that traffic goes through the proxy server instead of coming directly from your Windows 11 PC.

Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.