There's another worm infecting machines running Windows. This worm, named Blaster, infects via the TCP port 135 (RPC) that is also used for instant messaging. The worm will attempt to infect other systems, and will also open a TCP port 4444 with a command shell, so that anyone familiar with this exploit will also be able to access your machine. Also, it opens a UDP port 69 (tftp) and will infect any site accessing that port. We urge you to visit Symantec
for more information, and to protect your system.