Microsoft announced Tuesday that while it will move forward with its plans to discontinue sales of its Windows XP operating system, it will continue to provide support for the software for another six years. Microsoft announced in 2007 that it would extend the sales period for Windows XP until June 30, 2008. With that deadline set to expire in less than a week, the company had to do something to assuage the concerns of its customers, who have deluged the company with pleas to keep the OS on store shelves following the less-than-stellar rollout of Windows Vista.