Microsoft has begun posting XP SP3 RC documentation [1] to its Microsoft Download site, which is open to the general public. And the XP SP3 RC bits are available from various file-download sites [2] on the Web.
XP SP3 is primarily a collection of fixes and updates that Microsoft has released over the past few years since it rolled out XP SP2 in 2004. XP SP3 also does include a few brand-new features [1], like black-hole router detection; support for Network Access Protection (NAP) security-quarantining; enhanced security for administrator and service policy entries; inclusion of the Microsoft Kernel Mode Cryptographic Module; and Windows Product Activation modifications.
Microsoft explains the activation changes in XP SP3 this way:
“As in Windows Server 2003 SP2 and Windows Vista, users can now complete operating system installation without providing a product key during a full, integrated installation of Windows XP SP3. The operating system will prompt the user for a product key later as part of Genuine Advantage. As with previous service packs, no product key is requested or required when installing Windows XP SP3 using the update package available through Microsoft Update.”
Source: http://blogs.zdnet.com/microsoft/?p=1038&tag=nl.e622 [3]
Links:
[1] http://download.microsoft.com/download/6/8/7/687484ed-8174-496d-8db9-f02b40c12982/Overview of Windows XP Service Pack 3.pdf
[2] http://fileforum.betanews.com/detail/Microsoft_Windows_XP_Service_Pack_3/1197391546/1
[3] http://blogs.zdnet.com/microsoft/?p=1038&tag=nl.e622