Windows XP Service Pack 3 now on Windows Update

windowsxpMicrosoft Windows XP Service Pack 3 started appearing on Windows Update early this morning. Windows XP Service Pack 3 covers all previously released updates. Also included will be some private hotfixes that you could only acquire through special request. There are genuinely new features – not just patches and security updates, but services that could substantially improve system security without overhauling the kernel like with Windows Vista. These new features will not significantly change customers experience with the operating system.

Windows XP SP3 Build 5512 is the final release, also known as the Release To Manufacturing (RTM) build that made it’s way to TechNet, MSDN and OEMs. Service Pack 3’s size for the English release is 316MB. Other language releases may vary. There are several new features that come with SP3, they are Network Access Protection (NAP), Kernel Mode Cryptographic Module (KMCM) and the hardening of the TCP/IP stack with the new “black hole router” detection.

Warning: Do not install SP3 if you are running Microsoft Dynamics Retail Management System (RMS) on your PC.

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link Link: Windows Update

Network Access Protection (NAP) has been added with the release of Service Pack 3. This will help System Administrators to ensure that their network is both secure and healthy. Sysadmins will be able to set policies that determine if a computer is healthy or not by meeting set system health requirements. Examples of those requirements can be having the most recent OS updates installed, having the latest version of the anti-virus software including detection definitions, or if the computer has a host-based firewall installed and enabled.

Kernel Mode Cryptographic Module (KMCM) is a FIPS 140-1 Level 1 compliant, general-purpose, software-based, cryptographic module residing at the Kernel Mode level of the Windows Operating System. It runs as a kernel mode export driver (a kernel-mode DLL) and encapsulates several different cryptographic algorithms in an easy-to-use cryptographic module accessible by other kernel mode drivers. It can be linked into other kernel mode services to permit the use of FIPS 140-1 Level 1 compliant cryptography. It premiered in Windows 2000, and its first implementation in a Windows client was for the first edition of Vista.

Microsoft is also hardening the Windows IP stack. With this addition comes Microsoft’s new “black hole router” detection. Black hole router detection is a way for routers to detect in advance the shortest path to send a large number of datagrams, without having to fragment them too seriously along the way. As it turned out, some receiving routers that were pegged by sending ones as PMTU members were responding to datagrams with “do not fragment” messages by simply throwing them out. These were referred to as “black hole routers,” and have been a perennial plague to streaming operations. The new router detection scheme enables IP routers along the way to flag misbehaving PMTU candidates in advance and steer around them.