A tool is available to remove the Blaster worm and Nachi worm infections
from computers that are running Windows 2000 or Windows XP. http://support.microsoft.com/default.aspx?scid=kb;en-us;833330&Product=winxp
(833330) - After you install the 823980 security update or the 824146
security update on a computer that is infected with the Blaster worm or the
Nachi
worm, the computer may continue to generate network traffic on the affected
Transmission Control Protocol/User...