Clamwin Free AntiVirus For Windows

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.

http://www.clamwin.com/

Winpooch Windows Watchdog Anti Spyware and Anti Trojan
http://linuxwanita.blogspot.com/2007/09/winpooch-windows-watchdog-anti-spyware.html