Learn how to access and manage your Windows sign in options. Use a password, Windows Hello, or a security key to unlock your device.

Hotmail est maintenant Outlook.com. Découvrez comment vous connecter pour accéder à votre compte de messagerie Outlook.com, Hotmail, Live ou MSN.

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

Learn how the Photos app for Windows lets you view photos and videos from your PC alongside those from OneDrive, and keeps them organized by date, album, or folder.

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

如何将 IF 函数 (与 Excel 中) AND、OR 和 NOT 函数结合使用，以在给定值之间进行逻辑比较。

Learn how to troubleshoot Windows Media Player errors. Explore resources for general help with Windows Media Player.

Subscribed. A Subscribed badge means a Microsoft 365 subscription such as Microsoft 365 Family or Personal is already associated with your account and you can access many of your subscription benefits including installing the desktop apps.. Don't already have Microsoft 365, or you're looking for product details and prices? Buy or try Microsoft 365

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

Learn why it's important to have a backup, and how Windows Backup can help you keep your files and settings safe.