A good firewall should close and/or stealth NetBIOS 139...then the only problem left is sanitizing your comp...if you run a Windows OS, it may take some work, but just research it...it's logged in the registry. Try a program called RegVac found on www.cnet.com, the software scan should recognize it as a suspect program, and ask you to delete its associations with everything...do that.

Ouroboros