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Learn how to update Windows to ensure your device operates smoothly and securely with the latest features.

An upgrade differs from an update in that it moves your PC from a previous version of Windows—such as Windows 10—to Windows 11. This FAQ is intended to answer questions about upgrading to Windows 11.

Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.

How to recall and/or replace an email message you sent by using Microsoft 365 and your built-in Exchange Server account.

Applies To: Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Microsoft 365 admin, Outlook on the web, Outlook.com, New Outlook for Windows

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

Applies To: Outlook.com

Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by:

Applies To: Microsoft Defender on Android, Microsoft Defender on iOS, Microsoft Defender on Mac, Microsoft Defender on Windows

Learn how to check if your PC is capable of running TPM 2.0 or how to enable TPM 2.0 to upgrade to Windows 11.

Learn how to install Office 2013 on your PC or Office for Mac 2011.

Applies To: Office 2019, Office 2016, Office 2016 for Mac, Office 2013

Learn how to find your Windows product key for activation or when to use a digital license instead.

Applies To: Microsoft account dashboard

Learn different ways to locate your BitLocker recovery key in Windows, and learn about how BitLocker might have been activated on your system.