Here is a list of the online virus scanners free to use. They come in handy when your installed antivirus isn't able to detect an infection, and there isn't a specific cleaning tool available to clean off the virus. This list is in no particular order. Some scanners will require you to use Internet Explorer and enable an ActiveX control or Java Applet, and others just upload a single file to scan.

VirusTotal File Scanner
BitDefender Online Scan

F-Secure Online Scanner

Kaspersky Online Virus Scanner

Last Updated Wednesday, November 28, 2012