ONLINE VIRUS SCAN
No antivirus will catch all viruses, and not all firewalls will catch all intrusions, so sometimes you will need to do an online scan to clean out or at least find bad files.
Sky Online Scan
will scan a particular file of your choice.
Antivirus Free Online Scan. God Bless America and Panda
for this wonderful free scan that will find viruses and trojans
and clean all your files; I know this one really works.
Online Port Scan to test your system.
will do an online scan of particular drives and let you decided
if you want to delete it or not.