Use the Information Protection viewer to view protected files in Windows, Android, iOS, or Edge.

Xbox Support ... Xbox 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 ...

Learn how to turn on Control flow guard so you can install and run Windows Subsystem for Android.

Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.

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？

Keep your files, photos, and videos automatically backed up and available on all your devices.

This security update provides the latest changes for the Windows Security app. The update is composed of the Windows Security app and its underlying service. This update applies to only Windows 11 devices (build 22000 or later) To determine the current running version of the Windows Security app, run the following PowerShell command: Get-AppPackage Microsoft.SecHealthUI Windows Security ...

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.

Learn how to download and install apps you need from your Microsoft 365 business subscription.