Summary. Windows 10, versions 2004, 20H2, 21H1, and 21H2 share a common core operating system with an identical set of system files. Therefore, the new features in Windows 10, version 21H2 are included in the latest monthly quality update for Windows 10, version 2004, 20H2, and 21H1, but are in an inactive and dormant state.

Important: The following steps apply only to devices currently running an activated copy of Windows 11 Home.If you’re not activated, we recommend you activate Windows 11 Home first. For more info, see Activate Windows.

Pour obtenir de l’aide dans Outlook.com, cliquez ici ou sélectionnez Aide dans la barre de menus et entrez votre requête. Si l'auto-assistance ne résout pas votre problème, faites défiler la page jusqu'à la rubrique Avez-vous toujours besoin d'aide ? et sélectionnez Oui.. Pour nous contacter dans Outlook.com, vous devez vous connecter.

Microsoft Edge is the browser recommended by Microsoft. Support for Internet Explorer ended on June 15, 2022. If any site you visit needs Internet Explorer 11, you can reload it with Internet Explorer mode in Microsoft Edge.

Microsoft Defender is a security app that helps people and families stay safer online with malware protection, web protection, real-time security notifications, and security tips.Microsoft Defender is included in a Microsoft 365 Family or Personal subscription and works on your phone (Android or iOS), PC, and Mac.

If you don't have a Microsoft account, or you want to create a new one, you can follow these steps: Go to the Microsoft account sign-up page and click on Create account. Enter your preferred email address, or click on Get a new email address to get a new one from Microsoft. You can choose from @outlook.com or @hotmail.com domains.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

获取 Windows 操作系统的官方支持和帮助信息，以及如何使用 Windows 的指南。

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

Learn Excel skills from beginner to advanced with video tutorials, templates, and tips from Microsoft Support.