<A target="_blank" href="http://www.computerworld.com/s/article/9138007/Microsoft_No_TCP_IP_patches_for_you_XP">Microsoft released patches for TCP/IP, in MS09-048</A>, for Vista, Windows Server 2003, and Windows Server 2008. Originally they excluded only Windows Server 2000 SP4. Now the exclusion has been extended to Windows XP.