How to start a scan for viruses or malware in Microsoft Defender
If you suspect that your device may have malware you should have Microsoft Defender run a scan. Here's how to do that on Windows, Mac, or Android.
Applies To:
Microsoft Defender on Android, Microsoft Defender on Mac, Microsoft Defender on Windows
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： 掃描下列 QR 代碼 在 App Store 中搜尋 Microsoft Defender 與您的裝置共用，下列連結： 複製連結 我們鼓勵您為每個人至少在五部裝置上安裝 Microsoft Defender。 準備好試試看了嗎？
Applies To:
Microsoft Defender on Android, Microsoft Defender on iOS, Microsoft Defender on Mac, Microsoft Defender on Windows
Installing Microsoft Defender - Microsoft Support
Protect your Android, iPhone, Mac, and Windows devices from threats by installing Microsoft Defender. Download Microsoft Defender on your devices either by: Scanning the following QR code Searching for Microsoft Defender in your app store Sharing with your devices, the following link: Copy link We encourage you to install Microsoft Defender on at least five devices per person. Ready to give it ...
Applies To:
Microsoft Defender on Android, Microsoft Defender on iOS, Microsoft Defender on Mac, Microsoft Defender on Windows
Getting started with Microsoft Defender - Microsoft Support
Learn about getting started with the new Microsoft Defender on your personal devices including Windows, Mac, Android, and iOS.
Applies To:
Microsoft Defender on Android, Microsoft Defender on iOS, Microsoft Defender on Mac, Microsoft Defender on Windows, Microsoft Defender Online
Blocked attachments in Outlook - Microsoft Support
Learn more about why Microsoft 365 users can't open or view attachments in Outlook on the web. Share your files safely There are several ways to send and receive a blocked file. You can save the file to the cloud and send a link to the file, use a file compression utility like WinZip, or even rename the file with another extension, then have your recipient change the name back to the original ...
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.com, Microsoft Office, Outlook for Android, Outlook for iOS, Outlook Web App
Install and set up the Microsoft 365 Copilot app on an Android
Learn how to install the Microsoft 365 Copilot app on your Android phone or tablet and use the apps with Microsoft 365.
Applies To:
Microsoft 365 for home, Office for business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Small Business Admin, Office 365 operated by 21Vianet - Admin, Microsoft 365 Copilot app for Android, Microsoft 365 for Mac
Download and install or reinstall Office 2021, Office 2019, or Office ...
Learn how to install Office 2021, 2019, or 2016 on your PC or Mac.
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Office 2016, Office 2016 for Mac
在 Android 和 iOS 设备上使用 OneDrive - Microsoft 支持
本文提供有关在移动设备（特别是 Android 和 iOS）上使用 OneDrive 的综合指南。 其中包括有关下载、安装和登录到 OneDrive 应用的分步说明，以及管理文件、共享文件和脱机访问文件。 本文还提供了有关在移动设备上优化 OneDrive 的使用以及排查常见问题的提示和技巧。
Applies To:
OneDrive (home or personal)
Download files from the web - Microsoft Support
Learn how to download files from the web, change your default download location, and find files you've downloaded on your PC using Internet Explorer.
Download and install apps - Microsoft Support
Learn how to download and install apps you need from your Microsoft 365 business subscription.