了解如何使用产品密钥或数字许可证激活 Windows、检查激活状态，以及链接Microsoft 帐户。

Contact Microsoft Office Support for assistance with Microsoft 365, Office, Windows, Xbox, Surface products and more.

Learn how to get started with PowerPoint for the web from Office.com and create presentations online.

Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

Learn how to use antivirus protection in Windows Security to protect your Windows PC against malware, viruses, and other threats.

Erfahren Sie, wie Sie Ihren Windows-PC mit externen Monitoren verbinden und die Anzeigeeinstellungen anpassen.

You can repair some apps and programs if they're not running correctly. Note that you won't see repair, change, or modify options for all apps and programs.

Download the Microsoft 365 Access Runtime which allows you to run Microsoft 365 Access applications if you don't have the desktop version of Microsoft 365 Access and need to use an application built to run with Access 2010 or later.

How do I create a new account for Skype? Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

提示: 如果你使用的是无线显示适配卡，请在较新的电视上连接到 HDMI 端口，然后通过无线方式将电脑与其连接。将无线显示适配器连接到电视后，请转到 Windows 11 电脑上，按 Windows 徽标键 + K 打开投放，然后选择无线显示适配器。