Worm Lull, Windows XP SP2 Keeping Outbreaks At Bay

http://www.techweb.com/wire/security/161501182

"It seems that a more secure Windows environment is one of the main reasons for the relative quiet during the first quarter of this year."

Windows Server 2003 Service Pack 1

http://www.pcmag.com/article2/0,1759,1787561,00.asp

"With dozens of security and performance improvements, Service Pack 1 is a must-have upgrade for any enterprise running Windows Server 2003."