Download the EICAR anti-virus test file from http://www.eicar.org/anti_virus_test_file.htm This is not a virus, but a standard test file. Any anti-virus program should recognise it and treat it as a virus. ClamWin will report it as "Eicar-Test-Signature". The file is a DOS program, and if run it will print the message "EICAR-STANDARD-ANTIVIRUS-TEST-FILE!"