[Please note that ClamWin Free Antivirus does not include an on-access real-time scanner. You need to manually scan a file in order to detect a virus or spyware.] ClamWin Free Antivirus comes with an easy installer and open source code. High detection rates for viruses and spyware; 32.4 MB download. It features: High detection rates for viruses and spyware; Scanning Scheduler; Automatic downloads of regularly updated Virus Database.