In July 2010, WinXP SP3 enters Extended Support Phase.
In October 2014, all support for WinXP ends and no additional updates of any
kind will be released for the OS. Online self-help will still be available
(e.g., WinXP KBs).
Microsoft Support Lifecycle
http://support.microsoft.com/?pr=lifecycle
<QP>
The Microsoft Support Lifecycle policy took effect in October 2002, and
applies to most products currently available through retail purchase or
volume licensing and most future release products. Through the policy,
Microsoft will offer a minimum of:
• 10 years of support (5 years Mainstream Support and 5 years Extended
Support) at the supported service pack level for Business and Developer
products
• 5 years Mainstream Support at the supported service pack level for
Consumer/Hardware/Multimedia products
• 3 years of Mainstream Support for products that are annually released (for
example, Money, Encarta, Picture It!, and Streets & Trips)
</QP>