Microsoft Support is here to help you with Microsoft products. Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more.

Dec 5, 2025 · This page provides support links for home users and support phone numbers for business users.

User Account Control (UAC) is designed to prevent unauthorized changes to Windows. When an action requires administrator-level permissions, UAC prompts you to approve or deny the change. This …

Learn how to add user accounts in Windows 10 and Windows 11. With an account, each person has separate files, browser favorites, and a private desktop.

This article describes the sign in, sign out, lock, and switch user account actions in Windows. Expand the following sections to learn more.

For more information, see Change from a local account to a Microsoft account. If you have email messages in an email program, you must import your email messages and addresses to the new …

With integrated help and support, you can find solutions to questions and issues directly from the Surface app. You can easily access device, charging, and warranty information and view and …

Find help and how-to articles for Windows operating systems. Get support for Windows and learn about installation, updates, privacy, security and more.

Get Help for Microsoft personal account users If you sign in to your PC with a Microsoft personal account, you can use the Get Help app to access resources for troubleshooting issues and run …

Learn about user account basics in Windows. Sign in, sign out, lock, and switch account > Change or reset your Windows password > Change your user account picture > Using a Microsoft account in …