Supported portals include Internet Explorer, Firefox, Microsoft Outlook, Outlook Express, Google Chrome, Windows Live Messenger, and Yahoo Messenger.
Download Insight determines that a downloaded file might be a risk based on evidence about the file's reputation. Download Insight is supported only for the clients that run on Windows computers.
If you install Auto-Protect for email on your client computers, Auto-Protect also scans the files that users receive as email attachments.
Table: Managing Download Insight detections