Those people who get today's "Windows & .NET Magazine Security UPDATE--November 19, 2003" will have noticed a reference to Windows XP Service Pack 2: A Developer's View, an MSDN article which goes through the implications of applying SP2 to XP systems. It's not straightforward reading, I would point out...!
With Windows XP Service Pack 2 (SP2), Microsoft is introducing a set of security technologies that will improve Windows XP-based computers' ability to withstand malicious attacks from viruses and worms. The technologies include:
* Network protection
* Memory protection
* Safer email
* Safer browsing
This paper discusses the first two elements on this list.