Découvrez comment installer, réinstaller ou activer Microsoft 365 ou Office 2019 sur un PC ou Mac.

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

Click New chat to start a one-on-one chat and send messages in Microsoft Teams. To start a group chat, just add people to the conversation.

Learn how to install Windows 7 Service Pack 1 (SP1). Includes info about how to get the download, requirements, and more.

Get help with your questions about Microsoft Teams from our how-to articles, tutorials, and support content.

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

Learn about what effect closing a Microsoft account might have on your other apps and services.

We're committed to delivering continuous innovation by releasing new features and enhancements into Windows 11 more frequently. Windows devices get new functionality at different times as Microsoft delivers non-security updates, fixes, improvements, and enhancements via several servicing technologies—including controlled feature rollout (CFR). ...

Find out how to stop your screen from flickering after the upgrade to Windows 10.

Discover how to earn Microsoft Rewards points through various activities and redeem them for exciting rewards.