Here's a look at some of the new features:
Learn more at APC Mag.Descriptive Security Options UI – this makes the Security Centre a bit more intelligible and intuitive to try to prevent security problems caused by accidental misconfiguration Enhanced security for Administrator and Service policy entries – this is an enhancement to System Center Essentials, specifically for SP3 Black Hole Router Detection – this detects routers which are silently discarding network packets, and is enabled by default in SP3 Microsoft Kernel Mode Cryptographic Module – this module (FIPS.SYS) is a FIPS 140-1 cryptographic module which runs as a kernel mode export driver Network Access Protection – the NAP Client is network-based policy enforcement platform currently running on Windows Vista and Windows 2008 (beta), and will now be available in XP SP3 Windows Product Activation – this gives you the functionality to install Windows XP without having to enter the product key, as with Windows Vista and Windows Server 2003 SP2.