This open source antivirus solution is a valuable tool for security-minded admins. ClamWin supports Windows 7, Windows Vista, Windows XP, Windows Me, and Windows 2000/98 systems, as well as Windows Server 2008 and Windows Server 2003.

The tool includes a scanning scheduler that you can use to configure appropriate scan times but does not come with an on-access real-time scanner. It also has the ability to integrate into Windows Explorer and Outlook for easy scanning.

Although it may not work as well as a commercial real-time option for virus scanning, ClamWin is certainly a worthwhile tool, especially for shops seeking a free solution.

Download: www.clamwin.com