ClamWin Antivirus

ClamWin running on Windows 7.
Developer(s) ClamWin Pty Ltd
Stable release
0.99 / January 17, 2016 (2016-01-17)
Written in C++ and Python
Operating system Windows 98 and newer[1]
Type Antivirus software
License GNU General Public License

ClamWin is free, open source antivirus software for Microsoft Windows. It provides a graphical user interface to the Clam AntiVirus engine.


Firefox extensions exist that allow the users to process downloaded files with ClamWin.[2]

Real-time scanning

ClamWin does not automatically scan files as they are read and written.

The non-affiliated projects Clam Sentinel and Winpooch are add-ons that provide a real-time scanning capability to ClamWin.[3][4]


ClamWin has a virus database which is updated automatically when it detects connection to the Internet. A small balloon tip appears on the taskbar icon indicating completion status of the update process. It retries to establish connection with the server if it fails to download the updates first time.


Historically ClamWin has suffered from poor detection rates and its scans have been slow and less effective than some other antivirus programs. For example, ClamWin failed to detect almost half of the trojan horses, password stealers, and other malware in AV-TEST's "zoo" of malware samples.[5][6]

In the 1–21 June 2008 test performed by, ClamWin version 0.93 detected 54.68% of all threats and ranked 37th out of 49 products tested; the best scored over 99%.[7]

In the 10 August-05 September 2009 test performed by, ClamWin version 0.95.2 detected 52.48% of all threats and ranked 43 out of 55 products tested; the best scored 98.89%.[8]

On 6 September 2011 cNet gave ClamWin a rating of excellent, 4 of 5 stars.[9]

See also


  1. "About ClamWin Free Antivirus". ClamWin Pty Ltd. Retrieved 26 October 2011.
  2. FireClam
  3. dynclient (January 2010). "Clam Sentinel". Retrieved 2014-06-19.
  4. "Winpooch". Retrieved 2014-06-19.
  5. "ClamWin Free Antivirus (2009) - reviews - Security - PC World". 2009-09-01. Retrieved 2010-11-09.
  6. "Security Central Channel". InfoWorld. Retrieved 2010-11-09.
  7. "June 2008 comparison of effectiveness of antivirus programs". Archived from the original on 2011-07-21. Retrieved 2010-11-09.
  8. "2009-08, 10 August-05 September comparison of effectiveness of antivirus programs". Archived from the original on 2011-01-06. Retrieved 2010-11-09.
  9. "ClamWin Antivirus". 2012-09-15. Retrieved 2012-10-04.

External links

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