Microsoft® Windows® XP Professional is the next version of the Windows operating system, which is designed for businesses of all sizes, and for individuals who demand the most from their computing experience.

Windows® XP Service Pack 3 (SP3) includes all previously released updates for the operating system.

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Microsoft Windows XP Service Pack 3 32-bit (Spanish) - DreamSpark Disponible para: Usuarios de la comunidad académica	Gratis
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Windows XP Professional x64 Edition is designed to provide faster performance, increased reliability, and flexibility to today’s most demanding users, enabling them to run memory- and calculation-intensive applications and processes more efficiently. This new technology arms technical workstation users and cutting-edge home PC enthusiasts with a secure platform that can run new 64-bit applications as well as most existing 32-bit applications for maximum flexibility on a single PC.

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Microsoft Windows XP Professional 64-bit (English) - DreamSpark Disponible para: Usuarios de la comunidad académica	Gratis
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Windows XP Service Pack 1a (SP1a) provides the latest security and reliability updates to the Windows XP family of operating systems, and includes Internet Explorer 6 SP1a.