Microsoft's free XP, Office 2003 support ends April 14

If you have a Software Assurance licensing contract with Microsoft, you can buy paid support.

Windows XP SP2: Service pack will be retired on July 13, 2010.

Windows XP SP3: Service pack due to be retired two years after SP4 (if there is one) releases or in April 2014, whichever comes first.

Windows Vista Business: Free support ends on April 10, 2012; paid support ends on April 11, 2017.

Windows Vista SP1: Service pack will be retired two years after the release of SP2 (which is expected in April 2009), so likely in April 2011 (?).

Office 2003 SP3: Service pack will be retired one year after SP4 (if there is one, which is doubtful) is released or in August 2014, whichever comes first.

Office 2007: Free support ends on April 10, 2012; paid support ends on April 11, 2017.

Office 2007 SP1: Service pack will be retired a year after SP2 debuts, so likely in April 2010 (?).

Windows Server 2008: Free support ends September 7, 2013; paid support ends October 7, 2018.