some nai tools: some work, some not, i have used some, and some have not. might help, might make worse.

Google search for download stinger
http://www.google.com/search?hl=en&lr=&q=download+stinger&btnG=Search

McAfee Threat Center
http://vil.nai.com/vil/stinger/

McAfee Threat Center
http://vil.nai.com/vil/averttools.aspx