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Windows XP Pro Upgrade 64x Edition Available 9/1/05

The Windows XP Pro Upgrade item contains 2 CDs: One CD is Windows XP Pro w/SP2 (for 32-bit computer) -and- the other CD is Windows XP Pro x64 Edition (for 64-bit computer). The 64-bit version cannot be installed on a 32-bit machine. (If you attempt to do so, the software will let you know you need the 32-bit version). You will only be using 1 of the CDs and it includes everything you need to upgrade your operating system to Windows XP Professional. The license is perpetual--upon purchase you will own it forever.

Microsoft Windows XP Professional is a Windows operating system designed for businesses of all sizes, and for individuals who demand the most from their computing experience. Windows XP Professional goes beyond the benefits of Windows XP Home Edition with advanced capabilities designed specifically to optimize productivity using the latest advancements in the digital world. Built on the solid foundation of Windows 2000, Windows XP Professional provides improved reliability, security, performance and ease of use, setting the new standard in efficient and dependable computing.

Pink informational label on WISC software packaging reads:
Enclosed are 32bit and 64bit versions of Windows XP Professional. If you know that you have an x64 processor, install the 64bit version. Otherwise, install using the standard 32bit media. For more x64 info see http://www.microsoft.com/windowsxp/64bit/default.mspx .