I have found out a bit more about this scam.
The message that was sent by fake member ForumTeam contained a link to what is supposedly an anti-virus application called
Internet Security Tool 2010.
Internet Security Tool 2010 is a hoax. It is not a virus but is malware. It's purpose is to collect private info and pass this on to its creators. It only affects Windows PCs.
If you have this installed on your machine you must get rid of it ASAP.
See the following links for more info.
http://www.redcafe.net/f8/virus-alert-internet-security-tool-2010-a-284378/http://www.softsailor.com/how-to/13827-how-to-uninstall-remove-internet-security-2010-virus-removal-guide.htmlhttp://antivirustech.com/