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Windows XP Service Pack 3 (SP3) FAQ

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Q: What is Service Pack 3?

A: Windows XP Service Pack 3 (SP3) is the final Windows XP service pack, a collection of previously-released fixes and product enhancements, as well as a few new features that are unique to this release.

Q: Does SP3 include everything from SP1 and SP2 or do I need to install those first?

A: Because XP SP3 aggregates all of the previously-released XP fixes, you will not need to install SP1 or SP2 first: XP3 includes everything that was in those updates as well. That said, the same SP3 installer will work fine on any version of XP, regardless of which service packs and fixes were previously installed.

Q: Windows XP SP2 was released over three years ago. Why the delay on SP3?

A: While Microsoft is an enormous company with over 77,000 employees worldwide and over $50 billion in annual revenues, its organizational structure actually constrains which products are actively developed in some cases. For example, while a large team of developers, product managers, and program managers are involved during the ramp-up to any major OS release, Microsoft then pushes the product into its support organization for follow-up development in the form of hot-fixes, service packs, and so on. Other teams work on out-of-band updates that are typically shipped via the Web and, eventually, a new or existing team is constituted to work on the next major release and the entire process begins anew.

With Windows XP, however, Microsoft was forced to temporarily halt development on XP's successor, Windows Vista, in order to complete XP SP2. That's because this release, though provided to customers for free as a typical service pack, was in fact a major OS upgrade and was developed outside of the company's support structure, a first for any service pack release. After XP SP2 was completed, the people involved with that project moved onto other things, typically Vista or Windows Server 2008.

In the case of Windows XP SP3, Microsoft simply dedicated every available employee it could to completing Windows Vista, which by that time was years behind schedule. So it's only been since the beginning of this year that anyone turned their attention back to XP's next and neglected service pack.

Q: What are these new features I keep hearing about?

A: Windows XP Service Pack 3 will not include any major new features, but it will include four minor new features that improve the system's reliability and security. Contrary to reports, Microsoft has been very up-front about these functional additions for quite some time now.

These new features include:

Network Access Protection compatibility. Announced years ago, this feature allows Windows XP machines to interact with the NAP feature in Windows Server 2008. This functionality is built into the RTM version of Windows Vista as well.

Product Key-less install option. As with Windows Vista, new XP with SP3 installs can proceed without entering a product key during Setup.

Kernel Mode Cryptographics Module. A new kernel module that "encapsulates several different cryptographic algorithms," according to Microsoft.

"Black hole" router detection algorithm. XP gains the ability to ignore network routers that incorrectly drop certain kinds of network packets. This, too, is a feature of Windows Vista.

And that's about it. Nothing dramatic, as promised.

Q: That's it? Is there anything else?

A: Nothing else new. There are updated applications, which shipped long ago as separate downloads, like Internet Explorer 7 and Windows Media Player 11. And there are even some features that have been removed, like the taskbar-based Address Bar option.

Q: Why is Microsoft even bothering to release this update? Isn't everyone moving to Windows Vista?

A: Given the relative security, stability, and reliability of XP with SP2, and the subsequent release of Vista, XP SP3 may seem like a pointless update, but nothing could be further from the truth. Many businesses will roll out new XP-based PCs in the coming years, and as anyone who's had to update an XP SP2 system can tell you, the 100+ updates that Microsoft has shipped since SP2 can be a nightmare to deploy. If you're already running XP and have been regularly updating your systems all along, the release of XP SP3 will be a minor event. But if you have planned XP deployments in the future, look very carefully at this release and consider it the baseline for your next generation of PCs. Or, you could always consider Vista, which will of course be updated with genuine new features far longer than will XP.

Q: When will Microsoft ship XP SP3?

A: The company says that Windows XP Service Pack 3 will ship in the second quarter of 2008, or about three months after Windows Vista Service Pack 1 and Windows Server 2008.

By Paul Thurrott

October 12, 2007

Updated October 21, 2007

Edited by FantasyBoy

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Good job on posting this. Great FAQ ^_^

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