Developed and released by ClamWin Pty Ltd., ClamWin Free Antivirus is a free, open-source antivirus tool and software that provides users with a graphical user interface to the ClamAntiVirus engine. The antivirus software is designed with various features like real-time scanning, context menu integration, automatic virus database, scanning scheduler, and other add-ins. ClamWin also has a portable version that can be activated and used from a USB flash drive. The antivirus tool is written with C++ and Python languages and is designed for work with the Windows Microsoft operating system, versions 98 and newer. ClamWin’s high-performing software earned it an excellent (4/5) rating given by CNET.