Windows XP enters the stage of life known as Extended Support this week, but IT administrators should have their eye on a Windows OS family near the end of the Extended Support road: Windows 2000 Server (in all its flavors) and Windows 2000 Professional. For XP, Microsoft will continue to release free security updates (with the most recent service pack, SP3) through the usual channels until August 2014. But Windows 2000 is a much more pressing issue, however: The server and desktop iterations will leave Extended Support on July 13, 2010, marking the end of security hotfix availability.

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