It took a while for hackers to get their attack ready, but now a new Internet Worm has infected an estimated 9 million PCs! Downadup -- which also goes by the name "Conficker" -- exploits a bug in the Windows Server service used by all the common Microsoft operating systems: Windows 2000, XP, Vista, Server 2003 and Server 2008. Although Microsoft fixed the flaw with one of its rare "out of cycle" patch releases on October 23, 2008, an estimated 1/3 of all PCs have not yet been patched, according to Qualys, an Internet security company.
The Microsoft patch is available at http://www.microsoft.com/technet/security/Bulletin/MS08-067.mspx.
Symantec has a removal tool posted on their web site: http://www.symantec.com/security_response/writeup.jsp?docid=2009-011316-0247-99