安裝 Microsoft Defender - Microsoft 支援服務
安裝 Microsoft Defender，保護您的Android、iPhone、Mac和 Windows 裝置免於受到威脅。 在您的裝置上下載 Microsoft Defender，方法如下：
Applies To:
Microsoft Defender on Android, Microsoft Defender on iOS, Microsoft Defender on Mac, Microsoft Defender on Windows
安装 Microsoft Defender - Microsoft 支持
当你首次在 Android 上登录到Microsoft Defender 时，我们将引导你完成几个从设置 Web 保护 开始的简单步骤。 在此过程中，我们将要求你授予 Defender 执行两项操作的权限：在后台运行并使用辅助功能服务。
Applies To:
Microsoft Defender on Android, Microsoft Defender on iOS, Microsoft Defender on Mac, Microsoft Defender on Windows
如何在Microsoft Defender中开始扫描病毒或恶意软件
如果你怀疑你的设备可能有恶意软件，你应该Microsoft Defender运行扫描。 下面介绍如何在 Windows、Mac 或 Android 上执行此操作。
Applies To:
Microsoft Defender on Android, Microsoft Defender on Mac, Microsoft Defender on Windows
Installing Microsoft Defender - Microsoft Support
Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.
Applies To:
Microsoft Defender on Android, Microsoft Defender on iOS, Microsoft Defender on Mac, Microsoft Defender on Windows
Open encrypted and protected messages - Microsoft Support
Messages that have the encrypt-only policy applied can be read directly in new Outlook, Outlook on the web, Outlook for iOS and Android, Outlook for Windows versions 2019 and newer, and Microsoft 365.
Applies To:
Outlook for Microsoft 365, Outlook for Microsoft 365 for Mac, Outlook 2024, Outlook 2024 for Mac, Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2019 for Mac, Outlook 2016, Outlook 2016 for Mac, Microsoft365.com, Outlook on the web, Outlook.com, Outlook for Mac 2011, Microsoft Office, New Outlook for Windows, Outlook for Android, Outlook for iOS, Outlook Web App
使用 Windows 安全中心 应用保持保护 - Microsoft 支持
提示: 如果你是 Microsoft 365 家庭版或个人版订阅者，作为订阅的一部分，你将获得适用于 Windows、Mac、iOS 和 Android 的高级安全软件 Microsoft Defender。 有关详细信息，请参阅 Microsoft Defender 入门。
Xbox subscription cancellations and refunds | Xbox Support
Find out how to manage your Xbox subscriptions to request a refund or cancel a recurring payment.
開啟加密和受保護的郵件 - Microsoft 支援服務
瞭解如何識別和開啟加密和受保護的電子郵件，不論您使用何種電子郵件用戶端。
Applies To:
Outlook for Microsoft 365, Outlook for Microsoft 365 for Mac, Outlook 2024, Outlook 2024 for Mac, Outlook 2021, Outlook 2021 for Mac, Outlook 2019, Outlook 2019 for Mac, Outlook 2016, Outlook 2016 for Mac, Outlook on the web, Outlook.com, Outlook for Mac 2011, Microsoft365.com, My Office for iPhone, New Outlook for Windows, Outlook for Android, Outlook for iOS, Outlook Web App
Perform an offline system update | Xbox Support
The Xbox Offline System Update (OSU) process allows you to update your console by downloading a file to a USB flash drive and then installing that file directly onto your Xbox Series X|S or Xbox One console.
Request a refund for digital games | Xbox Support
Find out how to submit a request for a refund for a purchase of digital Xbox content.