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ClamWin

Version 0.103.2.1  ·  Updated: June 4, 2026
Open Source Windows ★ 4.8 (80 ratings)

Free, open-source antivirus for Windows with manual scanning and regularly updated virus definitions.

A. Lynch
A. Lynch
Software Analyst
LinkedIn ↗

ClamWin — Key Facts

Latest Version
0.103.2.1
Platforms
Windows
Price
Free to download
Official Site
sourceforge.net
User Rating
★ 4.8 / 5 (80 ratings)

ClamWin Screenshots

About ClamWin

ClamWin is a free antivirus application built on open-source principles under the GPL license. The software provides a graphical user interface for ClamAV, the popular command-line antivirus engine widely used to protect GNU/Linux servers. While ClamAV itself operates through terminal commands, ClamWin translates this functionality into an accessible Windows-native interface, making virus scanning available to home computer users without cost or licensing restrictions.

The application delivers core antivirus features typical of its category. A regularly updated virus database containing over 400,000 definitions is maintained automatically through network updates, ensuring detection signatures remain current against known threats. ClamWin operates through manual scanning—users initiate file checks by running scans themselves rather than relying on real-time protection. This approach means continuous background monitoring is not provided, but the software functions effectively as a supplementary scanning tool. The interface reflects practical design focused on essential functionality rather than modern visual styling, though usability remains straightforward for basic operations.

As part of the Antivirus category and distributed under Open Source principles, ClamWin serves users seeking additional protection layers without financial investment. The Windows application may appear feature-limited compared to contemporary commercial alternatives, and update frequency has historically been infrequent. However, for users wanting an extra scanner to verify files alongside their primary security solution, ClamWin presents a legitimate option. The software contains no advertisements or hidden costs, maintaining complete transparency about its capabilities and limitations.

The open-source nature enables community review and modification, differentiating it from proprietary solutions. Users interested in alternatives within the Free category or exploring other Open Source security tools will find ClamWin positioned as a specialized utility rather than comprehensive antivirus replacement. Installation and operation require no technical expertise, making the application accessible to general users despite its command-line heritage.

ClamWin is a open source antivirus & security available for Windows. Browse more free software or open source programs.

Frequently Asked Questions

Is ClamWin truly free to use?
Yes. ClamWin is distributed under the GPL open-source license with zero cost. No registration, subscription, or payment is required. The software contains no advertisements, trial limitations, or hidden charges. Users gain complete access to all features without financial investment, making it a genuinely free antivirus solution.
Does ClamWin provide real-time protection?
No. ClamWin does not include real-time monitoring. Users must manually initiate scans to detect viruses and malware. This design means the application functions as a supplementary scanner rather than comprehensive protection. Running periodic manual scans remains the intended usage model for threat detection.
How frequently are ClamWin virus definitions updated?
The virus database updates automatically through network connections and contains over 400,000 threat definitions. Updates are performed regularly to maintain current detection capabilities. Automatic updating ensures users receive latest signature data without requiring manual intervention or configuration.
What alternatives exist to ClamWin for Windows users?
Multiple antivirus options serve Windows systems, ranging from commercial solutions to other open-source projects. Users seeking real-time protection may consider alternatives with active monitoring. ClamWin functions best as an additional scanning layer rather than sole security solution, complementing existing protection strategies.
A. Lynch
Reviewed by A. Lynch
Software Analyst · PowerHypnosis Free App Hub
A. Lynch is a software analyst and writer covering free and open-source software for Windows, Mac and Linux. He has been reviewing software tools since 2010.
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Program Details
Version0.103.2.1
LicenseOpen Source
PlatformsWindows
Developersourceforge.net
UpdatedJune 4, 2026
CategoryAntivirus & Security
User Rating
4.8
80 ratings
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