Microsoft Support offers assistance for Microsoft products, including how-to articles, videos, and training for various software and devices.

请执行以下任一操作： 在 “翻译为 ”下拉列表中，选择要将页面翻译成的语言。 默认值是为Microsoft Edge设置的语言。

Follow these steps to temporarily turn off Defender antivirus protection in Windows Security. Keep in mind that if you do, your device may be vulnerable to threats.

Learn how to troubleshoot Windows activation errors. Browse common activation errors and learn what you can do to fix them.

Learn how to manage extensions in Microsoft Edge, including adding, disabling, or removing them as needed.

Microsoft's products and services work best if you use the same language and region across all your devices, and in all of your app and Store settings.

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。

Discover the latest features in Office 2021, including new ways to create content, manage data, and communicate effectively.

How to sign in to Outlook on the web, access your email, contacts, and calendar.

Learn how to locate and manage your app permissions on Windows devices. Some apps or games need specific permissions to work properly.