ClamWin is a Free Antivirus program for Microsoft Windows 8/ 7 / Vista / XP / Me / 2000 / 98 and Windows Server 2012, 2008 and 2003.
ClamWin Free Antivirus is used by more than 600,000 users worldwide on a daily basis. It 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.
The latest version of Clamwin Free Antivirus is 0.98.6

Please note that ClamWin Free Antivirus does not include an on-access real-time scanner. You need to manually scan a file in order to detect a virus or spyware.

Title : ClamWin0.98.4.1
Filename : clamwin-0.98.4.1-setup.exe
File size : 96.5711M
Requirements : Windows (All Versions)
Languages : Multiple languages
License : Open Source
Date added : 2015-04-08
Author : ClamWin

# This release updates ClamAV scanning engine to the latest version and brings following improvements:
* Added support for Office Open XML files
* Fixed a bug in Outlook scanning module introduced in 0.98.4 release
* Other bug fixes and stability improvements