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Microsoft normally terminates support for an OS within ten years of its release -- at the latest. 
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Microsoft normally terminates support for an OS within ten years of its release -- at the latest.

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It's also based on when the next version is released.<br />
Microsoft will sell OS until it has been obsolete for 1 year and will provide security patches and other critical updates until it has been obsolete for 7 years. <br />

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It's also based on when the next version is released.
Microsoft will sell OS until it has been obsolete for 1 year and will provide security patches and other critical updates until it has been obsolete for 7 years.


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When are microsoft going to stop supporting (patchs etc) Server 2003 as an OP system?
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When are microsoft going to stop supporting (patchs etc) Server 2003 as an OP system?

Server 2003

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).