The Microsoft Office Support Policy explains that Office versions have a 5 year window of Mainstream Support, and an additional 5 years of Extended Support.
On July 11, 2011, Office XP will exit the Extended Support period.
The chart below reflects the end of support for the main Office XP Release versions.
What does “end of support” mean?
The end of support means that we will no longer provide public fixes for the Office XP release. Automatic Updates that ship on “Patch Tuesday” will be discontinued. There will be no effect on installed software; products will still continue to function.
What options do Office XP users have?
Microsoft recommends that customers keep their systems secure by upgrading to the latest, supported product and/or service pack, such as Microsoft Office 2010. Office 2007 Service Pack 2 and Office 2003 Service Pack 3 are also supported for the duration outlined in the Support Lifecycle Product Database.