Learn how to reinstall Windows on your PC and how activation works after it's installed.

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

Learn how to change your Windows sign in from a local account to a Microsoft account to sync your settings across all your devices.

Use Settings in Windows 10 to change default apps and programs.

Learn how to download, install, and configure additional language packs for your version of Windows.

Defragment your Windows 10 PC. Optimizing your drives can help your PC run smoother and boot up faster.

Using Authenticator as a way to sign in. If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in:

This page provides phone numbers of Microsoft customer service.

Export Outlook email, contacts, and calendar to move them to another computer or so that you can make a backup of your information.

Comment se connecter à Outlook sur le web, accéder à votre messagerie, vos contacts et votre calendrier.