Windows XP Professional x64 Edition

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Windows XP Professional x64 Edition is an edition of Windows XP that supports the x86-64 architecture, released alongside the x86-64 versions of Windows Server 2003 on April 25, 2005. It is designed to use the expanded 64-bit memory address space provided by the x86-64 64-bit extensions to the x86 IA-32 architecture, which was implemented by AMD as "AMD64", found in AMD's Opteron, Athlon 64 chips (and in selected Sempron processors), and implemented by Intel as "Intel 64" (formerly known as IA-32e and EM64T), found in some of Intel's Pentium 4 and most of Intel's later chips since the Core series. Windows XP Professional x64 Edition uses the same kernel and code tree as Windows Server 2003 and is serviced by the same service packs. However, it includes client features of Windows XP such as System Restore, Windows Messenger, Fast User Switching, Welcome Screen, Security Center and games, of which Windows Server 2003 does not have. During the initial development phases (2003–2004), Windows...

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