Windows XP Service Pack 3 build 3205 - this SP3 build contains 1,073 hotfixes and patches; 114 of which are security related. SP3 also adds four major features to the Windows XP operating system:

• a new activation scheme which will not require a product key during installation
• a new Network Access Protection Module first featured in Windows Vista - it inspects client PCs before they access a corporate network, then updates the machines if necessary or blocks them if they don’t meet specified security criteria.
• a Microsoft Kernel Mode Cryptographics Module
• a Black Hole Router detection algorithm

To download Windows XP SP3, you will have to wait until Q1 2008, it’s not coming this year as expected.