ClamAV

ClamAV For Windows is a completely free and open source anti-virus software package. It features a command line interface for scanning files, updating the virus definitions, and a daemon for faster scanning needed on high performance systems. ClamAV is a security tool that protects your PC against viruses and it consumes very few resources. ClamAV includes a scanner which can detect more than 50.000 viruses, worms and trojans whise database is updated daily and automatically throughout internet.Unlike other antivirus products, ClamAV is completely free with source code to anyone who wishes to use it. The SOSDG has taken the latest ClamAV from the CVS tree, compiled it against the current stable Cygwin DLLs, which provide a full UNIX/Linux compatibility layer for Windows operating systems.