http://www.bitdefender.com/scan8/ie.html

http://housecall.trendmicro.com/it/

http://www.kaspersky.com/virusscanner/

http://www.f-secure.com/en_EMEA/security/security-lab/tools-and-services/online-scanner/index.html

http://www.eset.com/onlinescan/index.php

http://home.mcafee.com/Downloads/FreeScan.aspx?ctst=1