ClamWin ClamWin Free Antivirus comes with an easy installer and open source code. You may download and use it absolutely free of charge.

It features:
- High detection rates for viruses and spyware;
- Scanning Scheduler;
- Automatic downloads of regularly updated Virus Database.
- Standalone virus scanner and right-click menu integration to Microsoft Windows Explorer;
- Addin to Microsoft Outlook to remove virus-infected attachments automatically.