·April 14, 2008: Support is available for the release version of Service Pack 3 for Windows XP
·April 21, 2008: Original Equipment Manufacturers, Volume License, Connect, and MSDN and TechNet subscribers
·April 29, 2008: Microsoft Update, Windows Update, Download Center
·June 10, 2008: Automatic Updates
This information was found here: Neowin.net - Windows XP SP3 Release Dates
·April 21, 2008: Original Equipment Manufacturers, Volume License, Connect, and MSDN and TechNet subscribers
·April 29, 2008: Microsoft Update, Windows Update, Download Center
·June 10, 2008: Automatic Updates
This information was found here: Neowin.net - Windows XP SP3 Release Dates