Describes how to use the clean boot process to troubleshoot a problem in Windows 8.1, Windows 8, Windows 7, or Windows Vista.

Describes how to troubleshoot problems that occur when you install, uninstall, or upgrade a program on a Windows-based computer by using Windows Installer.

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

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

This content can help you with your work or school account, which is the account provided to you by your organization (for example, dritan@contoso.com).

See how to arrange all your open windows using the mouse, keyboard, or the Snap Assist feature in Windows.

Learn how to use Xbox cloud gaming on various devices including Android, iOS, and Windows with this comprehensive guide.

Access, download, or run the Surface app and the Surface Diagnostic Toolkit to help find and solve Surface problems.

Get started with Microsoft Teams (free). Explore your options, find out what’s new, browse help topics, and more.