I had the same problem in my company. This tool will clean it
http://www.malwarebytes.org/mbam.php, and updated kaspersky will catch it next time. I do not remember what my setting for riskware category was before KAV was able to stop it.
Regards,
Igor
P.S. MBAM only cleans it, but you need Kaspersky to stop it. And that machine had no antivirus/firewall software prior to this.
P.P.S. Either MBAM wasn't able to clean everything, or some other virus downloaded Antivirus 2009 again, but I needed few cleanups and reboots untill I was able to install and update KAV properly to stop it.
P.P.P.S. In my case I think that the name was Antivirus XP, but I belive it is "same shit, different name".