Download ClamWin – Free and Open-Source Antivirus for Windows

ClamWin is a free, open-source antivirus software for Windows built on the powerful ClamAV antivirus engine. It provides on-demand virus scanning, an automatically updated virus definition database, and integration with Windows Explorer for right-click scanning of files and folders, making it a practical free security tool for home and business users.

ClamWin uses the same ClamAV detection engine trusted by thousands of mail servers, web gateways, and enterprise security systems worldwide. The virus database is updated multiple times daily through the built-in automatic update scheduler, ensuring your system is protected against the latest threats including viruses, trojans, worms, and other malware.

As an open-source project, ClamWin is completely transparent, contains no spyware or adware, and can be freely distributed. It is particularly popular in environments where free, auditable antivirus software is required, and works well as a complementary scanner alongside a primary real-time antivirus solution.

Key Features

• ClamAV engine – Powered by the widely trusted ClamAV detection engine used in enterprise mail servers and security appliances worldwide.
• Automatic virus definition updates – Scheduled automatic updates of the virus signature database to protect against the latest threats.
• On-demand scanning – Scan individual files, folders, or entire drives on demand with detailed scan reports and quarantine options.
• Windows Explorer integration – Right-click any file or folder in Windows Explorer to scan it with ClamWin directly from the context menu.
• Scheduled scanning – Configure automatic scans to run at scheduled times to keep your system checked without manual effort.
• Microsoft Outlook integration – Scan email attachments in Microsoft Outlook automatically to detect malicious files before they are opened.
• Free and open source – Completely free with full source code available, no ads, no bundled software, and no hidden costs.

How to Install

1. Download the latest ClamWin installer from the official website (clamwin.com) or the link provided above.
2. Run the installer and follow the setup wizard to complete installation on your Windows system.
3. During or after installation, ClamWin will download the latest virus definitions database — this may take a few minutes depending on your connection speed.
4. Launch ClamWin from the Start menu or system tray icon to access the scanner and configuration settings.
5. To scan a file or folder, right-click it in Windows Explorer and select Scan with ClamWin from the context menu, or use the main ClamWin interface to schedule regular scans.