DIYers IT Zone

ClamWin is a free antivirus program that support Microsoft Windows 98/ME/2000/XP/2003/Vista.

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.

But this software does not provides on access scanning, user need to manually scan system. But i like this, because it can save some resources for better performance on low level pc.