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

Learn how to open and run DxDiag.exe on Windows to collect device information and troubleshoot DirectX sound and video issues.

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

了解如何使用别名更改 Microsoft 帐户电子邮件地址或电话号码以登录到 Microsoft 帐户。

Learn how to unlock your Microsoft account and resolve 'account has been locked' error message.

The new Microsoft Edge helps you browse, search, shop online, and more. Like all modern browsers, Microsoft Edge lets you collect and store specific data on your device, like cookies, and lets you send information to us, like browsing history, to make the experience as rich, fast, and personal as possible.

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

If you are having trouble with your microphone features, the following information can help you troubleshoot and resolve issues.

Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.