To help our members and guests keep their computers up to date and secure we are providing a link to Service Pack 3 (SP3). Windows XP SP3 adds new functionality and also has a slight performance increase. Network Access Protection (NAP) Kernel Mode Cryptographic Module (KMCM) Hardening of the TCP/IP stack, including "Black hole router" detection Warning: Do not install SP3 if you are running Microsoft Dynamics Retail Management System (RMS) on your PC. Direct Downloads: Windows XP SP3 E